Concept:Every bird builds its nest in a unique way using different materials and locations. The nest provides shelter for eggs and young ones.
Explanation:- Sunbird is tiny and makes a hanging nest from a branch. It uses hair, grass, dry leaves, and cloth pieces. So, Sunbird matches (IV).
- Koyel (cuckoo) does not build its own nest. It lays eggs in a crow's nest. So, Koyel matches (I).
- Indian Robin builds its nest between stones on the roadside. It uses soft twigs, roots, wool, hair, and cotton wool on top. So, Indian Robin matches (II).
- Tailorbird stitches two leaves of a bush together using its sharp beak to make a nest. So, Tailorbird matches (III).
Thus, the correct pairing is: A-(IV), B-(I), C-(II), D-(III).
Answer:Option D: A - (IV), B - (I), C - (II), D - (III)