What does a tailor bird do to stich it's nest

The tailor bird has a beak like a sewing needle. As thread, it uses silk from cobwebs, cotton from seeds, and fibers of tree bark. This bird selects two or more large green leaves growing close together at the end of a branch and pulls them together.

Explanation:

The bird that stitches its nest. The most intriguing quirk of the common tailorbird (Orthotomus sutorius) is perhaps that it creates its nest by sewing leaves together with its beak.

Explanation:

h let me think

the answer is either b or c