Here's why:

* Producers: Plants, algae, and some bacteria are called producers because they can trap light energy from the sun through photosynthesis and convert it into chemical energy stored in sugars. This energy is then available to other organisms in the food chain.

* Consumers: Animals and fungi cannot directly trap sunlight. They get their energy by consuming producers (herbivores) or other consumers (carnivores). They break down the stored chemical energy in their food to power their bodies.

* Decomposers: Bacteria and fungi break down dead organisms and waste products, releasing nutrients back into the environment. They also obtain energy from these decaying materials.

In summary:

* All living things need energy to survive, but only producers can directly capture energy from sunlight.

* Consumers and decomposers rely on the energy captured by producers.

Therefore, while all living things need energy, not all living things can trap energy directly from the sun.