Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.

To identify the types of cell junctions described in the question, we can analyze the functions of different intercellular junctions:

1. Stopping leakage of substances:
Tight junctions function to seal adjacent epithelial cells together just beneath their apical surface. This prevents the leakage of substances, such as water, ions, and proteins, across the tissue space (paracellular pathway).

2. Facilitation of communication with neighboring cells:
Gap junctions are specialized intercellular connections that directly connect the cytoplasm of two cells. They allow the rapid transfer of ions, small molecules, and second messengers between neighboring cells, facilitating metabolic and electrical communication.

Therefore, the cell junctions that prevent leakage and facilitate rapid communication are tight junctions and gap junctions, respectively.

Hence, the correct option is Tight junctions and Gap junctions, respectively.