Summarize the main idea of Charles Darwin's theory of natural selection as it is outlined in 'The Origin of Species':

'...natural selection acts by competition, preserving beneficial variations and rejecting those that are harmful. Variations neither useful nor injurious would be unaffected by natural selection...I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.'
Summarize the main idea of Charles Darwin's theory of natural selection as it is outlined in 'The Origin of Species':

'...natural selection acts by competition, preserving beneficial variations and rejecting those that are harmful. Variations neither useful nor injurious would be unaffected by natural selection...I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.'
user
Charles Darwin's theory of natural selection, as outlined in 'The Origin of Species,' explains that natural selection works through competition by preserving beneficial traits and rejecting harmful ones. Variations that are neither useful nor harmful are unaffected by natural selection. This process leads to the preservation and accumulation of traits that enhance survival and reproduction.
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Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: What does this text say about the term borough in New York City:

The term borough was adopted in 1898 to describe a form of governmental administration for each of the five fundamental constituent parts of the newly consolidated city. Under the 1898 City Charter adopted by the New York State Legislature, a borough is a municipal corporation that is created when a county is merged with populated areas within it.[1] The limited powers of the boroughs are inferior to the authority of the government of New York City, contrasting significantly with the powers of boroughs as that term is used in Connecticut, New Jersey, and Pennsylvania, where a borough is an independent level of government, as well as with borough forms used in other states and in Greater London.[2]
Response: The term "borough" describes the governmental administration of each of the five constituent parts of New York City, The term's use began with the 1898 City Charter which states that each borough is a municipal corporation created when a county is merged with populated areas. The powers of the boroughs are inferior to those of the government of New York City which is in contrast to the term "borough" used in other locations such as Connecticut, New Jersey, Pennsylvania, and Greater London.

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.
