Final answer:
As you move down a trophic level, the total biomass of a level decreases, the size of individuals increases, and the number of individuals decreases.
Step-by-step explanation:
As a general rule, as you move down a trophic level, the total biomass of a level decreases, the size of individuals increases, and the number of individuals decreases. This is because less energy is available at higher trophic levels, resulting in fewer organisms that can be supported. Although individual organisms tend to be larger in size at higher trophic levels, their smaller numbers result in less biomass.