Organisms that feed upon other living organisms as a source of energy and nutrients are called as

The correct answer is B. Consumers.

Consumers are organisms that cannot make their own food and must consume other organisms to survive. They are divided into three groups: herbivores, carnivores, and omnivores.

• Herbivores eat plants.
• Carnivores eat animals.
• Omnivores eat both plants and animals.

Pests are organisms that damage or destroy crops or other valuable materials. Decomposers are organisms that break down dead organisms and return their nutrients to the environment.

Producers are organisms that can make their own food from inorganic substances. They are the first link in the food chain and are essential for the survival of all other organisms.