I want to know the answer to the following question:
What limits the size of a trophic pyramid?
All the background I'm provided with is that "Because only a fraction of energy is passed on to the next level, this hierarchy of predation must end somewhere, and very seldom goes higher than five or six levels, and may go only as high as three trophic levels (for example, a lion that preys upon large herbivores such as wildebeest, which in turn eat grasses).". Is that enough to answer the question?
Answer: yes