Which activity would be within the field of biology?

a. measuring the amount of time it takes light to reach earth from the distant star

b. doing research how plastic affect the environment

c. study on the manufacture of plastic bags.

d. studying the mechanics of how ships release waste

(B) Doing research how plastic affect the environment is the activity that would be within the field of Biology.

Biology is the study of life. Environment includes the surroundings and the lives involved on it. Therefore, plastic affect both the surrounding and the lives of every living creature.