A producer is an organism that makes its own food, usually through photosynthesis. Examples include plants like grass and algae.

The energy in a food chain starts from the Sun.

Algae is an example of a producer.

A food chain is the way energy is passed from one organism to another in an ecosystem.

The correct order is grass, snail, bird, cat.

Consumers are organisms that eat other organisms for energy. They can be herbivores, carnivores, or omnivores.

A herbivore is an animal that only eats plants.

A carnivore is an animal that only eats other animals.

An omnivore is an animal that eats both plants and animals.

The top predator is the organism at the top of the food chain that has no natural enemies.