Respuesta :

This is called cephalization. In mammals, this cephalization occurs primarily in the head...brain, eyes, ears, mouth.

Answer:

The correct answer is cephalization.

Explanation:

Being a evolutionary feat, cephalization is umbrella term for concentration of sense organs such as eyes and ears, feeding organs such as mouth and nervous system such as ganglia, brain and cerebellum. For flatworms the ganglia concentrated in one end of the body which is "nerve tissue" in your question.

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