A study of guppy fish shows that a male guppy will alter its courting patterns in response to feedback from a female guppy. Males with more orange on one side than the other were free to vary which side they showed to a female. Females were drawn to those males with more orange showing, and males tended to show the females their more orange side when courting.
The statement 'When a model of a female guppy was substituted for the female guppy, male guppies still courted, but were not more likely to show their side with more orange' provides the most support for the argument.