Is a leaf decompose consumer or producer?

A leaf is a producer.

Producers are organisms that can make their own food from inorganic matter. Plants are producers because they can use sunlight, water, and carbon dioxide to make glucose, which is a type of sugar that plants use for energy. Leaves are part of plants, so they are also producers.

Consumers are organisms that cannot make their own food and must eat other organisms to get energy. Animals are consumers because they must eat plants or other animals to get the energy they need to survive.