Answer:
Energy Flow in Ecosystems. Ecosystems maintain themselves by cycling energy and nutrients obtained from external sources. ... The low rate of energy transfer between trophic levels makes decomposers generally more important than producers in terms of energy flow.
Explanation:
To raise an arm upward the muscle on one side of it contracts. It relaxes the muscle on the opposite side of the arm.
A variable that depends on something else
Answer:
Proportional sized vehicle.
Explanation: