Here's why:

* Collenchyma cells have thick, uneven cell walls made of cellulose and pectin. This gives them strength and flexibility, allowing them to support the plant without being rigid.

* They are found in young stems, leaves, and petioles (leaf stalks), where they provide structural support for growth and movement.

While other cells contribute to plant structure, collenchyma cells are specifically responsible for maintaining shape and providing flexibility.