Final answer:
Organisms in an ecosystem acquire energy in different ways and transfer it between trophic levels. Energy is lost at each transfer, affecting the structure and dynamics of the ecosystem. Environmental factors and geological processes can also cause energy loss.
Step-by-step explanation:
Organisms in an ecosystem acquire energy in a variety of ways, which is transferred between trophic levels as the energy flows from the bottom to the top of the food web, with energy being lost at each transfer. The efficiency of energy transfer between trophic levels affects the structure and dynamics of the ecosystem. Environmental factors and geological processes can also lead to the loss of energy in an ecosystem.