The mode of seeds dispersal in Cotton and Madar (Calotropis) 

Concept: Seed dispersal is done by both abiotic factors like air, and water and biotic factors like animals, and butterflies. It has an important significance for plant survival as plants can't move. Due to the seed dispersal mechanism, seeds can move at a far place from the parent plant. seeds that are dispersed by air needed to be light. Seeds of cotton and madar have hair, which makes it easy for air.

Hence, the correct answer is option A.