LIFE SCIENCE

Detailed explanation-1: -The amount of energy transferred from a lower trophic level to a higher trophic level always decreases as energy is lost at each step as heat. Only 10 percent of energy is transferred from one trophic level to the next.

Detailed explanation-2: -The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.

Detailed explanation-3: -Energy transfer between trophic levels typically follows the ten percentile rule. From each trophic level to the next, 90% of the starting energy is unavailable to the next trophic level because that energy is used for processes such as movement, growth, respiration, and reproduction.