The 10% law of the flow of energy in an ecosystem was proposed by:

Correct answer: (a) Lindeman

Explanation

The 10% law of energy flow was given by the American ecologist Raymond Lindeman in 1942. It says that only about 10% of the energy at one trophic level is passed on to the next; the rest is used in respiration or lost as heat. That is why food chains rarely have more than four or five links.

• Karl Möbius introduced the idea of the biocoenosis (a community of living things).
• Arthur Tansley coined the word "ecosystem" in 1935.
• Van 't Hoff was a chemist known for his work on chemical equilibrium and osmotic pressure.