Instructions: Read the following sentences, studying the gap after each sentence to see if additional explanatory content (development) can be added after that sentence. If extra development is needed, check a development method, and in the blank below describe the content that could be added after that sentence. Write the explanations something like this: What's a Kuiper Belt object? (your choice of development method will show automatically). To review, see this discussion of development (opens in a separate browser window).
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