The correct statement about the type of junction and their role in our body is Option B: Tight junctions help to stop substances from leaking across a tissue.

Let's break down why this is correct and why the other options are incorrect:

Tight junctions are indeed responsible for forming a seal between cells, preventing the passage of fluids and molecules between them. This is crucial for maintaining the integrity of tissues and organs. Imagine the lining of your stomach or intestines - tight junctions ensure that digestive juices and enzymes don't leak out and cause damage to surrounding tissues.

Here's why the other options are incorrect:

Option A: Adhering junctions facilitate the cells to communicate with each other.

This statement is incorrect. While adhering junctions do help in holding cells together, they are primarily involved in providing structural support and mechanical strength to tissues. Communication between cells is primarily facilitated by gap junctions, not adhering junctions.

Option C: Tight junctions help to perform cementing to keep neighbouring cells together.

This statement is partially correct, but incomplete. While tight junctions do play a role in holding cells together, their primary function is to form a barrier, preventing leaks. Adhering junctions are more specifically responsible for cementing cells together.

Option D: Gap junctions help to create gaps between the cells and tissues.

This statement is completely incorrect. Gap junctions actually form channels between cells, allowing for the direct passage of ions, small molecules, and even electrical signals. These channels are essential for cell-to-cell communication and coordination in various tissues like heart muscle and smooth muscle.

In summary, tight junctions act as barriers, adhering junctions provide structural support, and gap junctions enable communication between cells.