Assertion: chameleon's cell | /r/CapableOf | expand in response
Facets:
value: to the need for concealment
type: CAUSE
value: to the color of the environment
type: CAUSE
Source sentences:
text: These cells expand and contract, in response to the color of the environment and the need for concealment, as well as to the animal’s psychological or physical state (e.g. pain or aggression).