An ecological pyramid of energy flow is, often an inverted pyramid in which of the following ecosystem?

Answer: Option B

An ecological pyramid of energy flow is, often an inverted pyramid in the Ocean ecosystem.
Life on the ocean's surface connects worlds. From shallow waters to the deep sea, the open ocean to rivers and lakes, numerous terrestrial and marine species depend on the surface ecosystem and the organisms found there.
In this ecosystem, the standing crop of phytoplankton, the major producers, at any given point will be lower than the mass of the heterotrophs, such as fish and insects. This is explained as the phytoplankton reproduce very quickly, but have much shorter individual lives.