Respuesta :

Answer: 900 kcal

Explanation:

Since only 10% of the energy of an organism is used by the organism, 900 kCal is used by the producer or lost as heat to the environment.

What is an energy pyramid?

An energy pyramid is also being referred to sometimes as an ecological pyramid. It shows the flow of energy from producers to decomposers. The producers are found at the base of the pyramid.

Since only 10% of the energy of an organism is used by the organism, 90% is  used by the producer or lost as heat to the environment. Hence, 900 kCal is used by the producer or lost as heat to the environment.

Learn more about energy pyramid: https://brainly.com/question/1616196