Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: Metabolism is controlled by regulation of what? Answer: enzyme activity
[A]: 8.5 Regulation of enzyme activity helps control metabolism.

[Q]: Question: What phenomenon is crowding out other species and making all the other causes of extinction worse? Answer: human overpopulation
[A]: Human overpopulation, which is crowding out other species. It also makes all the other causes of extinction worse.

[Q]: Question: What is the logarithmic scale that measures the largest jolt of energy released by an earthquake called? Answer: richter scale
[A]:
The Richter scale is a logarithmic scale that measures the largest jolt of energy released by an earthquake.