Solution

Aphids are also known as plant lice. Aphids weaken and destroy plants by sucking out the life-giving sap from leaves, stems and fruits. Plants attacked by aphids get yellow leaves and start to wilt, slowly dying.
Valisneria americana is a freshwater species that grows in ponds, lakes, and quiet streams at depths of 1 to 4 m. The grasslands serve as ecological niche for the desert locusts from which they migrate in adjoining fringe of agricultural lands.
Vultures live in mountains, grasslands and deserts. They generally do not live in forests or in areas that receive a lot of rain. Vultures are scavengers.