Question

aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants. mutualism predation parasitism commensalism

Explanation:

Mutualism is a symbiotic relationship where both organisms benefit. Predation involves one organism killing and eating another. Parasitism is a relationship where one organism (parasite) benefits at the expense of the other (host). Commensalism is a relationship where one organism benefits and the other is neither helped nor harmed. Aphids living on and eating plant leaves, taking nutrients from plants, is a case of one - organism (aphids) benefiting while the other (plants) is harmed, which is parasitism.

Answer:

Parasitism