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: Give me a one-sentence summary of this text, please. 

Lowland forest
This type of forest is found at elevations of up to approximately 1000 metres within the tropical belt. Due to the high rainfall and constant warm temperatures, they provide the perfect environment for plants and animals and so contain a great diversity of life. Lowland rainforests contain the tallest trees of all the types of rainforest, with the largest variety of species. (Source: mongabay.com)
Response: Lowland forests exist in the tropical belt at elevations up to 1,000m, where warm, wet conditions support diverse flora and fauna and the biggest rainforest trees. 

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 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.

Provide a one-sentence summary of the following information about the Great Barrier Reef: 
The Great Barrier Reef, located off the coast of Queensland, Australia, is the world's largest coral reef system, comprising over 2,900 individual reefs and 900 islands spanning over 2,300 kilometers. It is one of the most bio-diverse marine ecosystems on the planet, home to thousands of marine species, including fish, mollusks, birds, and sea turtles. However, it faces significant threats from climate change, pollution, and human activities.
user
The Great Barrier Reef in Australia, the world's largest coral reef system, supports vast marine biodiversity but is threatened by climate change, pollution, and human activities.
assistant