Question

which is the best example of a closed system? a desert astronaut’s spacesuit water treatment plant

Explanation:

A closed system is one that exchanges energy but not matter with its surroundings. A desert is an open system (exchanges matter and energy). A water treatment plant is open (exchanges matter like water, chemicals). An astronaut’s spacesuit is designed to keep matter (like air, water) inside while allowing energy (heat, light) exchange, fitting a closed system.

Answer:

B. astronaut’s spacesuit