Answer:
Tributary-river-river system
i think this is the answer
Explanation:
They are well at surviving because of their thick white coat. The white fur helps them blend in with the snow and ice. The polar bear also has a layer of fat under their skin so they can survive harsh temperatures.
Answer:
The correct answer is CHLOROPHYLL
The ability of an organism to change internally or externally in relation to changes in the environment is called adaptation.