Question

aid in the coordination of the activities of adjacent animal cells. plasmodesmata desmosomes tight junctions gap (communicating) junctions keratin fibers

Explanation:

Gap (communicating) junctions allow for the passage of ions and small molecules between adjacent animal cells, enabling them to coordinate their activities. Plasmodesmata are found in plant cells. Desmosomes provide strong adhesion between cells. Tight junctions form a seal between cells to prevent leakage. Keratin fibers are part of the cytoskeleton and not for cell - to - cell coordination in this context.

Answer:

Gap (communicating) junctions