Q: An inversion may result when what kind of mass moves over cold ground?


Read this paragraph and choose the correct option from the provided answers:

When a new air mass moves over a region it brings its characteristics to the region. This may change the area's temperature and humidity. Moving air masses cause the weather to change when they contact different conditions. For example, a warm air mass moving over cold ground may cause an inversion.

 Choices:

- warm water

- cold water

- cold air

- warm air


A:
warm air