Here is a scale model of a fountain at a Museum. The scale is 1:30. How many boulders are in the real fountain?

A. 20

B. 3

C.300

D. 10

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 three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.