When an animal uses two kinds of signals together to obtain a response,
there is a communication

When an animal uses two kinds of signals together to obtain a response,  there is a communication Cycle.

Explanation:

Communication is the process in which one organism transmit the information to another organism (receiver) causing any kind of change in behavior of receiver. Usually communication is done between two organisms of same species however there are special type of communication that can be done between different species.

Animals uses different sources of communication called signals for example,  

Visual signals

Auditory signals

chemical signals

Tactile signals

When an animals uses two types of signals to get the responce it is called a communication cycle.

there's no big difference.

explanation:

the only little different between a rabbit and bunny is just that bunnies are much smaller than rabbits. bunnies are basically baby rabbits.