question: Habitat loss caused by human actions is a prime culprit in what phenomenon, which appears to be occurring for a sixth time?
distractor3: Big Bang
distractor1: spontaneous mutation
distractor2: mass migrations
correct_answer: mass extinction
support: Evidence shows that a sixth mass extinction is occurring. The single biggest cause is habitat loss caused by human actions. There are many steps you can take to help protect biodiversity. For example, you can use less energy.