Question

if you have to drive on a long trip, wearing your seatbelt prevents your ______ from tiring so quickly.
neck
fingers
brain
muscles

Explanation:

When driving, wearing a seatbelt helps support the body, reducing the need for muscles (especially those used to maintain posture) to work hard. Neck, fingers, and brain don't tire quickly due to seatbelt use in the context of posture support during long drives. Muscles are responsible for maintaining body position, and a seatbelt eases that muscular effort.

Answer:

muscles