state the main function of leaf tendrils.

Tendrils are the threadlike structure and are modified stems or the leaves. The tendrils intertwine around whatever it touches. In this way it helps the plants with the weak stems to climb, Tendrils are the plant structures whose function is to help the plant climb . A tendril will actually wrap itself around anything that it comes into contact with and then it provides support to the plant as the plant continues to grow upward.