Flaring of square in cotton is due to

✅Explanation: Flaring of squares (the unopened flower buds) in cotton is a characteristic symptom of damage caused by the spotted bollworm. The larvae of this pest feed on the developing squares, causing them to flare open and eventually drop off, resulting in yield loss.

📌Other Options Explanations:
-Option A: Pink boll worm: Pink bollworms primarily attack the bolls (the fruit capsules) of cotton plants, causing damage to the developing seeds and lint.
-Option C: American boll worm: American bollworms also feed on cotton bolls, but they can also attack squares and flowers, leading to similar damage as the spotted bollworm.