Answer: The three basic levels in an ecosystem are Producers, consumers and decomposers.
Producers: The green plants that make high energy molecule such as glucose (food) by the help of the sunlight is known as the producers.
Example: Plants and blue-green algae.
Consumers: The small animals that feed on the plants for their energy requirement is known as consumers.
Example: Rabbit, Goat, Cow et cetera.
Decomposers: The bacteria, fungi and other microorganism that feed on the dead and decaying animals and obtain energy from this organic matter is known as decomposers.
Example: Winter fungus.
