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

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