Question

a house is a system. which of the following is a part of this system? the weather the door the air the ground

Explanation:

A system's parts are components that belong to or are part of the system. A house system includes its own structural components. The door is a physical component of the house, while the weather, air, and ground are external to the house system (weather is atmospheric conditions, air is a general atmospheric element, ground is the earth below, not a part of the house structure itself).

Answer:

The door