What commonly undergoes a type of movement that changes population size?
insects trees birds animals ducks scorpions rocks goats
A B C D E F G H
Bird migration is common.
birds commonly undergo a type of movement that changes population size
What commonly undergoes a type of movement that changes population size? (A) insects (B) trees (C) birds (D) animals (E) ducks (F) scorpions (G) rocks (H) goats