What  can be used for communication by animals?
electricity energy Telephones. Vibrations. Stuffed animals. messengers courtship Cellular communication.
A B C D E F G H
Sound vibrations have different frequencies.
 Vibrations can be used for communication by animals.
What  can be used for communication by animals? (A) electricity (B) energy (C) Telephones. (D) Vibrations. (E) Stuffed animals. (F) messengers (G) courtship (H) Cellular communication.