Concept:In a food chain, energy decreases at each successive trophic level, so the top consumer has the least energy.
Explanation:The pyramid of energy shows the usable energy present at each trophic level.
Spirogyra is a producer, so it captures the most energy from sunlight.
Tadpoles feed on Spirogyra and receive less energy than the producer.
Fish feed on tadpoles and obtain even less energy.
Birds feed on fish and occupy the highest trophic level in this pyramid.
Energy is lost at every transfer through respiration, movement, and heat production.
Thus, the bird receives the least amount of transferred energy.
Answer:D. Bird
