A combination is a substance formed when two or more different elements combine.
True or false

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

the answer is b. glad to .

if you know your abc's you should be able to get your answer or just use google

69 is the correct math for the amino acids