Question

How does energy usually flow in ecosystems?
A.
from the Sun through consumers to producers
B.
from producers through the Sun to consumers
C.
from consumers through the Sun to producers
D.
from the Sun through producers to consumers

Answer 1

D. from the Sun through producers to consumers.

Producers (e.g., plants, algae) capture solar energy by photosynthesis and convert it into chemical energy. Consumers obtain that energy by eating producers (or other consumers). Energy flow is essentially one-way and is lost as heat at each transfer.