In Michigan, two different species of gray treefrogs, Hyla versicolor and Hyla chrysoceles, can exist in the same pond at the same time. The two species are anatomically very similar, but their mating calls differ. How would you describe the existence of such similar species in the same location?

This is an example of sympatric frog species

Explanation:

Sympatric species are those species that are found in the same habitat and are morphologically similar (even indistinguishable sometimes); however, these species have reproductive barriers and they are therefore genetically distinct

the answer to your question is b

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101