An association between two organisms benefiting both is called:

Explanation

Option A is incorrect because Commensalism is relationship in which one organism is benefited other is neither benefited nor harm.Option B is incorrect because Parasitism is relationship in which a parasite live with host body get food and shelter and in return cause disease.Option C is incorrect because Predation is a relationship in which an animal feed on other animal and the animal feed is predator and animal that is caught and eaten is prey.Option D is correct since An association between two beneficial organisms is called symbiosis.