In order for humans to live on Mars, they would need to develop methods for getting air, water, and food. What type of system would this need to be?
(1 point)
Responses
an open system; no matter or energy is being exchanged
an open system; no matter or energy is being exchanged
a closed system; no matter or energy is being exchanged
a closed system; no matter or energy is being exchanged
an open system; energy is exchanged with the surroundings and not lost
an open system; energy is exchanged with the surroundings and not lost
a closed system; energy is exchanged with the surroundings and not lost