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plants
Everything in the food chain uses solar energy. Plants use it to grow and to make it's food. Animals need it because that is what they eat and we need animals and plants to survive.
Technically, everything-we all get all of our energy from the sun. Plants convert the energy into food that we consume directly, or indirectly through the animals that eat the plants. We gain the energy from eating the plants or the animals.
The producers (plants), the consumers (animals) and the decomposers (bacteria) use the food chain.
Algae
plants make their own food by photosynthisis which uses the suns energy to produce sugars to make food
Chloroplasts.
photosynthesis
Producers are plants. They're at the bottom of the food chain. They use sunlight and carbon dioxide to make food.
Plants in the process called photosynthesis.
Most life on Earth is powered by the Sun. Plants use Photosynthesis to make carbohydrates from the Sun. Animals eat Plants, we eat both plants and animals that eat plants. Therefore indirectly virtually all of our food energy comes from the Sun. Our Brain uses our food energy to operate. Therefore our brain is powered by the Sun.
Plants use photosynthesis to make their own food using sunlight.