Question

Ravi went to his cotton field there he observed some of the cotton leaves were affected by insects He also observed that weeds in between are not affected give reasons

Answer 1

This is because that weeds take all the nutrition from the soil and don't let the plant to take the nutrition this is the reason why the weeds are not affected and only field crops are affected ...

Answer 2

The reasons for the weeds were not affected is due to some category of weeds were poisonous and if biotic interference is there the destructors which will feed on them they will die.

Some of the weed's leaves have a bad odor to prevent the destroyer to attack it.

This property keeps the destruction away.

Some weeds have thorns on leave surface which make uncomfortable for the destructors who try to attack and feed on them.