Question 4 Living things ... (make sure to mark 3 answers)
1. use energy
2. move
3. respond to environmental or internal changes (or stimuli)
use oxygen
4. reproduce

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

it's c. (to reduce the greenhouse effect/carbon gasses)

option c is the correct answer.