Why are there fewer top carnivores than herbivores in most land ecosystems?
a) More energy exists at the level of secondary consumers than producers.
b) Much energy is lost in the transfer of energy from herbivores to carnivores.
c) There is only enough food for a few top-level consumers, but there is a lot of food for herbivores lower down on the food chain.
d) Both b and c
e) All of the above