Final answer:
The air in an anticyclone sinks, which signifies a high-pressure system associated with calm and clear weather. This downward movement results in warming and drying of the air, inhibiting cloud formation.
Step-by-step explanation:
The air in an anticyclone moves downward, which implies that the correct answer is B) Sinks. In an anticyclone, also known as a high-pressure system, the air descends from above and spreads out on the surface when it reaches the ground. As the air sinks, it warms and becomes drier, which typically leads to clear skies and stable weather conditions. Anticyclones are associated with fair weather because the sinking air inhibits cloud formation. It is worth noting that the direction of air movement on the surface radiating from the center of the anticyclone depends on the hemisphere: clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere due to the Coriolis effect.