a single mate for both sexes

A) acoustical signals
B) pheromones
C) monogamous
D) visual communication
E) tactile displays
F) polygynous
G) polyandrous
H) promiscuous

Monogamous

Involving a relationship or mating system in which an individual has only one partner during their lifetime or at any one time.

Pheromones

Chemical substances produced and released into the environment by an animal, especially an insect or mammal, affecting the behavior or physiology of others of its species.

Acoustical Signals

Sounds or audio signals that are used for communication or other purposes, varying in frequency, amplitude, and waveform.