Question

Four students were asked for the primary source of energy for most living organisms. Which student provided the correct answer?

Student 1-- Humans because they are top level consumers.

Student 2-- Green plants because they are the only organisms that use photosynthesis.

Student 3-- Wind because it helps distribute seeds over long distances.

Student 4-- The sun because sunlight powers almost all food chains on earth.

Answer 1

The sun. The sunlight energy flows from one trophic level through the next. Energy flows throughout the ecosystem and the primary source of energy for almost every ecosystem on Earth is the sun.