Question

Why are there less organisms as you move up the pyramid?

Answer 1

Because the organisms on top of the pyramid are what feed off of the ones more bottom on the food scale, the organisms on top are the main compatetors

Answer 2

Answer: As we go further along a food chain, there are fewer and fewer consumers. The further along the chain you go, the less food (and hence energy) remains available. In other words, a large mass of living things at the base is required to support a few at the top