Which of the following statements accurately explains how earth’s atmosphere supports life?
a. earth’s atmosphere contains 78 percent oxygen, which is essential for life.
b. earth’s atmosphere contains 21 percent oxygen, which many life forms need to
survive.
c. earth’s atmosphere contains more oxygen than carbon dioxide.
d. earth’s atmosphere contains carbon dioxide, which all life forms breathe in.

the answer is B.

Explanation:

you may have thought that the answer is a but that is false information and C. and D. are completely wrong

B  i know because i looked it up and my first answer was wrong

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

the answer would be   10%