a

Energy moves through the organisms from the top to the bottom and increases at each level.
b
Energy moves through the organisms from the top to the bottom and decreases at each level.
c
Energy moves through the organisms from the bottom to the top and decreases at each level.
d
Energy moves through the organisms from the bottom to the top and increases at each level.

b

Energy moves through the organisms from the top to the bottom and decreases at each level.