If these organisms were arranged into an energy pyramid, which organism would have the least amount of energya: miceb: grassesc: rabbitsd: foxes

The correct answer is D. Foxes

Explanation:

10% law of energy transfer says that only 10 % of energy is available to be transferred in the next tropic level by previous trophic level and the rest of the energy will be lost as heat in the environment.  

So only 10 % of energy will be transferred from primary producer to primary consumer. Then the primary consumer will transfer 10% energy to the secondary consumers and so on. So organisms at a lower trophic level will get more energy than organisms of the upper trophic level.

So in this flow chart foxes are on the top of the trophic level as secondary or tertiary consumer, therefore, it will get the least amount of energy, therefore, the correct answer is D: Foxes.