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: Sum up this paragraph in one sentence:

Your fireplace mantel should match the vibe of your overall decor style—but adding some outdoor elements is going to be a great way to keep things fresh as the seasons change. 'Bringing in color and texture with fresh flowers, stems, or greenery is always a good choice,' says Dufresne. So nod to cozy fall decorating ideas or sweet spring additions for more character all year round.
Response: Adding outdoor elements such as flowers, stems, or greenery to your mantel keeps your decor fresh as the seasons change.

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.

Summarize this scientific theory in one sentence: The theory of evolution by natural selection, proposed by Charles Darwin, states that species evolve over time through the process of genetic variation and selection, where advantageous traits become more common in successive generations.
user
Darwin's theory of evolution by natural selection explains that species evolve over time through genetic variation and the selection of advantageous traits.
assistant