What is the function of the class of macromolecules represented in the following diagram

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

In general, are there any major differences that you can see? explain