PATHOLOGY

Detailed explanation-1: -Sclerenchyma cells are essential to the mechanical support of the plant and have the thickest cell walls of the three. There are two forms of sclerenchyma cells, sclereids and fibers.

Detailed explanation-2: -So, the correct answer is ‘Sclerenchyma’.

Detailed explanation-3: -Collenchyma cells have thick walls that are especially thick at their corners. These cells provide mechanical support for the plant. They are most often found in areas that are growing rapidly and need to be strengthened. The petiole ("stalk") of leaves is usually reinforced with collenchyma.

Detailed explanation-4: -Sclerenchyma is a type of simple permanent tissue that has thick and dignified walls. Sclerenchyma gives structural support and rigidity to plants.