The question is asking for a comparison between the bricks in a building and something in living organisms. Option 1 suggests that the bricks in a building are similar to cells in living organisms.

Option 1: Cells - Cells are the smallest unit of life in living organisms. They perform various functions and can be compared to bricks because they are the building blocks of living organisms. Just like bricks are assembled together to form a building, cells come together to form tissues, organs, and ultimately, an entire living organism.

Option 2: Tissues - Tissues are made up of a collection of cells that have a specific function in the body. While tissues are made up of cells, they are not the most basic unit like bricks in a building. Therefore, this option is not the best comparison.

Option 3: Organs - Organs are complex structures made up of different tissues working together to perform specific functions. Although organs are made up of cells, they are not as comparable to bricks as cells are, as organs are more complex structures.

Option 4: Glands - Glands are specialized organs that produce and secrete substances. While glands are a type of organ, they do not represent the basic unit like bricks or cells do.

Therefore, the correct answer is