Question

6. In a pea plant, the leaf is modified into a thin thread-like coiled structure
a. thorn.
b. hook
c. spine.
d. tendril.​

Answer 1

d) tendril

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Answer 2

In some plants leaf and leaf parts get modified into green, thin branched, long sensitive thread like structures called tendrils.

Explanation:

• The tendrils provide support to the plant by coiling around it.
• Tendrils are present in pea plant. In some plants leaves turn into curved stiff claw like hooks  helping in the support.
• In plants such as Nepenthes, the lamina is modified to form a large pitcher.  
• This is used for storing water and digesting the animal protein. In plants like Utricularia, the leaf segments  are modified into small bladders to trap the small insects.

To learn more:

1. How do the wings of insects differ from the wings of birds?

https://brainly.in/question/6982780  

2. Both birds an insects have wings. how are birds different from insects:

https://brainly.in/question/4489540