Answer: Option B
Explanation:
Pyramid of energy can be defined as the pyramid which shows the flow of energy in an ecosystem.
The energy from the sun is trapped by plants and is transferred from plants to animals and then from smaller animals to larger animals.
Detrivores and decomposers are present at every level of energy pyramid so there is no energy level assigned to them.
So, it is a disadvantage of energy pyramid to assign detrivore and decomposers a particular tropic level.