Here's why:
* Gap junctions are specialized intercellular connections that directly connect the cytoplasm of adjacent cells. They are formed by proteins called connexins, which assemble into channels.
* These channels allow for the passage of small molecules, including ions, nutrients, and signaling molecules like hormones, between cells.
* Tight junctions, another type of cell junction, are responsible for sealing the space between cells, preventing leakage.
* Desmosomes are strong anchoring junctions that hold cells together but don't provide passage for molecules.
So, the correct answer is gap junctions.