Insulin

Morphine

Nicotine

Quinine

Parasite is an organism which always lives inside the body of other organism and may kill it.

Host is an organism which provides food to another organism.

Amensalism is a relationship in which one species is benefited where as the other is unaffected

Predator is an organism that catches and kills other organism for food.

B

A

D

C

Uttarakhand

Assam

Uttar Pradesh

Himachal Pradesh