DENDROLOGY

Detailed explanation-1: -Collenchyma is a type of permanent tissue. It allows easy bending of plant parts without their breakage. It provides mechanical support to plants thus it provides flexibility to plants. It is present in leaf stalks below the epidermis.

Detailed explanation-2: -(d) chlorenchyma The flexibility in plants is due to collenchyma. Collenchyma allows the bending of various parts of plant-like tendrils and stems of climbers without breaking. It also provides mechanical support.

Detailed explanation-3: -Collenchyma cells provide structure and support to the plant but still allow for flexibility, unlike other supporting ground tissue cell types, like sclerenchyma cells which are more rigid.