Why are animals dependent on a continuous supply of energy from the sun?

Plants need the energy from the sun to grow. The small animals, such as rabbits, eat these plants to grow. Meat eaters such as hawks, prey on these rabitts, therefore connects hawks to the sun.

Because the hawks eat the rabbits, who eat plants, who use the sun... the hawks are inderrectly dependent on the sun's enegy. Even humans are in need of the sun, as vegetariands eat plants, and omnivors eat cows, who eat plants. Therfore, every living being on this plant is dependent on the suns energy in one way or another.