The Limited Number of Tropic Levels Is Most Likely Due

Multiple Choice

The limited number of tropic levels is most likely due to

A) reduction in energy up the tropic scale.
B) the large proportion of energy that is transferred from one tropic level to the next.
C) the high level of energy available at the top of the ecological pyramid.
D) the constant level of energy available at the base of different ecosystems.
E) The constant energy flowing from one energy level to the next.