The energy pyramid describes the transfer of energy between organisms in a marine ecosystem. The phytoplankton at the bottom of the pyramid take in and store a certain amount of the Sun's energy. Does all of the energy stored by the phytoplankton reach the top level of the pyramid?

A.
Yes, because plants transfer all of their energy to herbivores, who transfer all of their energy to carnivores.
B.
Yes, because the amount of energy in an ecosystem is constant since energy cannot be created or destroyed.
C.
No, because very few of the organisms in the energy pyramid eat the phytoplankton and receive their energy.
D.
No, because some of the energy is lost to the environment as heat as it is transferred between organisms.