When a warm front passes your location, the temperature rises rapidly. as a result, air density:

b?

increases
decreases
remains the same

decreases

Explanation:

As you know when the temperature of a medium decreases, the density increases, the majority of the solids present in nature depende of a certain temperature, when they heat up they tend to go to a liquid form and then to gas, so if the temperature in the are rises rapidly the densitiy of the air would decrease as it is expanding because of the rise of the temperature.

i just learnt this recently but i need to look through my notes again