The elasticity of a substance describes how fast or slow its particles bounce back-and-forth asmove through the object. A:vibrations
B:chemicals
C:electrons
D:surface waves

answersilicon (si); oxygen (o);

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101