Biology

The correct answer is: B.To control and coordinate body systems.

In multicellular organisms, cells communicate to regulate and coordinate the activities of various systems. This allows organs and tissues to work together, maintaining homeostasis and enabling responses to external stimuli. Cell signaling is essential for processes like immune responses, growth, and development.

Explanation of other options:

A.To increase the number of cell types: While communication is important for differentiation, the ma...