Detailed Instructions: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
Q: Warm, humid climate allowed life to expand and diversify during the early cambrian period.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
What allowed life to expand and diversify during the early cambrian period?