Answer:
What has a head and a tail, but no body or legs?
I save lives on the ground and in the air. What am I?
I am black within and red without With four corners round about.
I have two bodies joined together as one. When standing still I run and run.
I am a mountain at night, meadow at day. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?