If a toxic chemical was introduces to the grass in this environment, the cheetah would probably die. Everything the cheetah eats eats grass except the birds. Since all of those things eat grass, which has a toxic chemical, and the cheetah eats them, gaining bioaccumulation, and a larger biomass, and they now have the toxic chemical inside them, the cheetah now has the chemical. Then the cheetah will die. Also the other animals won't have as much biomass anymore because the grass will be dead.
If the Sun went out everything would die. First, everything would freeze because the sun provides heat. Also the grass would die, then the things that eat grass would die, and everything that eats those things would die, so everybody dies.
If the Sun went out everything would die. First, everything would freeze because the sun provides heat. Also the grass would die, then the things that eat grass would die, and everything that eats those things would die, so everybody dies.