Answer
About 10% energy is converted to biomass from one trophic level to another trophic level.
Explanation
Food chain is composed of different trophic level which are classified on the basis of their mood of food obtain. These include
1. Producers (photosynthetic)
2. Primary consumers (herbivore)
3. secondary consumer (Carnivore)
4. Tertiary consumer (carnivore)
5.Quaternary consumer (Carnivore)
6. Decomposer
As larvae are hatched by insects which belong to second trophic level. About 90% of energy in food is lost at each trophic level. As move down the trophic level the number of organism also decreases in each trophic level. Therefore, energy transfer from one trophic level to another is like a pyramid.