Which of the following statements about migration is true? a. migration is always from one region to another. b. animals always migrate within a region. c. migration always negatively impacts an ecosystem. d. animals migrate for various reasons.

A is the only logical answer. As most know geese migrate yearly going from one place to another so it would only make since to inquire that A is correct.

Have a good one.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.