12. Which of the following diversities boosts the availability of oxygen?

A. character

B. ecosystem C.

D. species

13. Which is an genetic example of ecosystem diversity?

A. earth

B. river

C. storm

D. sun

14. What is the major reason for extinction of species?



A. hunting

B. forest fire

C. habitat destruction

D. their use for food

15. Why is genetic diversity important?

A. It enables to create their own habitat.

B. Global warming threatens monoculture.

C. It allows for species to adapt and thrive in different environments.

D. All statements are true.​