Air masses generally move from:

The correct answer is High Pressure to Low Pressure. Air masses move due to differences in atmospheric pressure. This movement is driven by the pressure gradient force, which causes air to flow from areas of higher pressure to areas of lower pressure. This is a fundamental principle of wind and atmospheric circulation. Among the options:

• Low Pressure to High Pressure: Incorrect; air does not naturally flow from low to high pressure.
• West to East Only: Incorrect; air moves in various directions depending on pressure systems and the Coriolis effect.
• High Pressure to Low Pressure: Correct; this is the basic principle of air movement.
• North to South Only: Incorrect; air movement is not restricted to a single direction.

Therefore, the correct answer is "High Pressure to Low Pressure".