What does "reef" mean in a sailing context?

• A. To increase the size of a sail
• B. To reduce the area of a sail to decrease wind pressure
• C. To secure the anchor
• D. To change the course of the boat

Answer: (B)

In the context of sailing, "reefing" specifically refers to the process of reducing the area of a sail to decrease the wind pressure on the sail. This is typically done in stronger wind conditions to maintain control of the boat and prevent overwhelming it with too much sail area. By folding or rolling part of the sail, or by using a reefing line, sailors can effectively manage the balance and performance of the vessel.

Reducing the sail area is crucial for safety and stability, especially when facing gusty winds or rough seas. It allows the boat to maintain speed and maneuverability without the risk of heeling excessively or capsizing.

Other choices, while relevant to sailing, do not accurately define "reef" in this context. Increasing sail size, securing the anchor, or changing the course of the boat are different activities with their own terminologies and implications in sailing.