Statement - A : The neural organisation is very simple in lower invertebrates and it is better organised in insects, where a brain is present.Statement - B : Coordination is the process through which two or more organs interact and complement the functions of one another.

The neural organisation is very simple in lower invertebrates. For example, in Hydra it is composed of a network of neurons. The neural system is better organised in insects, where a brain is present along with a number of ganglia and neural tissues. The vertebrates have a more developed neural system.The functions of the organs/organ systems in our body must be coordinated to maintain homeostasis. Coordination is theprocess through which two or more organs interact and complement the functions of one another.