Question

a thread like coiled modification of leaves​

Answer 1

Explanation:

Leaf modification in pants (i) In some plant, the leaf and leaf parts get modified to form green, long, thin unbranched and sensitive thread-like structures called tendrils. The tendrils coil around the plant and provide support to the plant in climbing.

Answer 2

Tendril is a modified leaf, stem or petiole. It is a sensitive thread-like structure that can coil around a support. It is present in climbing plants. Its main function is support and attachment.