Question

For example, they can smell certain kinds of pheromones, which are

chemicals that some animals release as messages to other animals in
their same species, influencing social interactions, mating behaviors or
aggression responses.
The author uses the word "pheromones" to mean:
(A) aggression responses
(B) chemicals
(C) social interactions
(D) mating behaviors

Answer 1

the author is saying CHEMICALS or B

Answer 2

B. The author is using pheromones to describe chemicals.