Riddle

I save lives on the ground and in the air. What am I?

Choose an answer

A.Airbag
B.Helmet
C.Parachute
D.Seat belt
Hint: It's a 2-word phrase with 8 letters, starting with "S".

Answer

Seat belt

Why this is the answer

A seatbelt is worn in cars and required on airplanes, protecting passengers on the ground and in the air alike.

This riddle is filed under "What Am I?" Riddles and rated Easy.