The key idea in the text is that despite not knowing everything about it, the one thing they do know is that [they] live in a cooling place.
Breaking it down:
- It’s physical condition is still largely a mystery (meaning there are still gaps in their knowledge, hence they don't know everything about it) but we know now that even in its equatorial region (where they live) the midday temperature barely approaches that of our coldest winter (their midday temperature is not nearly as cold as ours but its still cold/chilly).
The key idea the text suggested is that winter is a period that is always cold.
Key idea is usually present in text and it communicate the message or the main aim of a particular writing.
A writer should write to make the key idea known for better understanding.
Thus, the key idea the text suggested is that winter is a period that is always cold.
Learn more on key idea here,
https://brainly.com/question/1119015
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