what happens when a gas is compressed? density is increased. volume is increased. pressure is decreased…

Brief Explanations:

When a gas is compressed, the volume decreases while the mass remains constant. Since density = mass/volume, a decrease in volume leads to an increase in density. According to the ideal - gas law (PV = nRT), when volume decreases, pressure increases (assuming constant temperature and amount of gas). Also, compression usually does work on the gas, which can increase its temperature.

Answer:

A. Density is increased