Fact 1: Hearing is used for sensing sound by animals.

Fact 2: Hearing is measured in decibels, which is the degree of loudness required to hear the sound.

Given the two facts above, answer the question "What can animals sense?" with the following options: 
- a pathogens
 - Temperature
 - hormones
 - decibels
 - mitosis
 - heat
 - erosion
 - decomposition


 

    decibels     