Animal sounds and signals are considered language because: _____. select all that apply.
a.they are completely arbitrary
b.they are not considered language
c.they are governed by rules for usage
d.they are uniform and conventional
e.they are used to communicate
Audio indicates that it is audible, in other words, that humans are proficient of hearing, whereas sound elongates exceeding the human ear capacities, like ultrasound which is steeper pitched than what our ears can hear.