It’s C. The start point of the cycle. I took this on my test
Answer: The sun generates energy from a process called nuclear fusion.
Explanation: I hopes this helps you out.
The moment it is exposed into the environment
Answer:
the first wave of extinction may be related to rapid cooling at the end of the Ordovician Period, and the second phase is widely regarded as having been caused by the sea-level fall associated with the glaciation.
