Question

the sun provides energy for life on earth which is used by organisms to perform life functions. this energy moves up the food chain is considered a(n) ____________ because energy flows into and out of the system. closed system open system

Explanation:

In an open - system, energy and matter can flow into and out of the system. Since the energy from the Sun enters the Earth's food - chain system and energy also leaves the system (e.g., as heat loss), it is an open system. A closed system has no exchange of energy or matter with the surroundings.

Answer:

B. open system