Question ask “ which part of the ecological pyramid is incorrect.”

Energy flow is incorrect in this ecological pyramid.

An ecological pyramid shows how energy naturally flows in an ecosystem. Most pyramids are divided into a group of organisms that include:

The main mistake in this ecological pyramid is that the flow energy row has been placed incorrectly. Based on this pyramid, energy flows from higher levels such as tertiary consumers to lower levels such as primary producers.

This is false, for example, it is expected the energy from grass flows from the grass to the primary consumer such as a deer or a rabbit, rather than the opposite.

Learn more about ecological pyramid in: link

the answer is b. dilution