Secure means what?

• A. To lock up or prepare for locking up
• B. To secure something by locking up
• C. The area in which an airline flies on a regularly scheduled basis
• D. A large expanse of concrete used for takeoff and landing

Answer: (B)

The word secure here means fastening or locking something so it cannot move or be accessed. In practice, to secure an item is to lock it up, ensuring safety or control. The best choice states this directly: to secure something by locking up. The other options introduce unrelated ideas or add extra meaning (like preparation or a different aviation term) that isn’t in the intended sense of securing by locking.