Which statement describes the dependent variable?
it is the causal variable.
it is the controlled variable.
it is the stimulus variable.
it is the measured variable.

The statement which describes the dependent variable would be the measured variable. We usually use the independent variable and manipulate it and change its levels to see how the levels of the measurable (dependent) variable change. 

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

c. live where it’s cold and icy