In the given following food chain, vertical arrow indicate the energy lsot to the environment and horizontal arrows shows energy transferred to the next level of trophic. Now say, Which one of the three (3) vertical arrows (A, C and E) and which one of the two (2) horizontal arrows (B and D) will display more energy transfer? Give reason for your answer.

If you carefully observe, firstly, A will represent more energy transfer as compared to C and E. Secondly, B will represent more energy transfer as compared to D.

When green plants are taken as food by primary consumers, energy lost is seen as a great amount as heat to the environment, some amount goes into digestion and in doing work and the rest goes towards growth and reproduction. An average of 10% of the food eaten is made available for the next level of consumers. This loss of energy takes place at every trophic level.
Alternatively accept – In accordance with 10% law of transfer of energy in a food chain only 10% of energy available at one trophic level is transferred to the next trophic level.