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Erudite1

The correct option is C.

The pyramid of numbers and the pyramid of biomass can be inverted but the pyramid of energy can not be treated in the same way. The pyramid of energy is a graphical representation of the flow of energy in the ecosystem. The ultimate source of energy in the ecosystem is the sun. The plants, which are called the producers use the energy of the sun to produce their own foods. It is the energy that the primary consumers obtained from the producers that will be pass on to others in the ecosystem. Thus, the value of the energy reduce gradually as it is passed from one level to another.

Ans.

The ecological pyramids are defined as graphical representations that show productivity or biomass at each trophic level in an ecosystem.

The pyramid of energy that cannot be inverted is pyramid of energy that shows transfer from one trophic level (from lower trophic level) to another trophic level (to higher trophic level).

This is because, according to 10 percent law of energy transfer, only 10 percent of total energy gets passed from lower to higher energy energy and energy flow occurs in an unidirectional manner.

Thus, the correct answer is option c). 'pyramid of energy.'

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