Why Is the Sun the Ultimate Source of Energy for All

Why is the sun the ultimate source of energy for all carnivores?

A) When energy from the sun heats water,animals at all trophic levels can absorb the energy contained in the water each time they take a drink.
B) Carnivores are able to absorb heat from the sun during the daytime and use it to increase their metabolic rate,allowing them to hunt more effectively.
C) Some of the energy produced during photosynthesis passes from one trophic level to the next as herbivores eat producers and are then eaten by carnivores.
D) Producers eat plants that contain solar energy gathered during photosynthesis,and the energy passes to carnivores when they eat the producers.
E) As consumers,carnivores get some of their energy directly from the sun through photosynthesis and the rest by hunting and eating other animals.