Seemingly Invisible

Riddle: Die without me, Never thank me. Walk right through me, Never feel me. Always watching, Never speaking. Always lurking, Never seen. What am I?

Answer: Air.

Source: https://www.riddles.com/387

Die without me, Never thank me. Walk right through me, Never feel me. Always watching, Never speaking. Always lurking, Never seen. What am I? — Seemingly Invisible by Anonymous v1.

Riddle: Die without me, Never thank me. Walk right through me, Never feel me. Always watching, Never speaking. Always lurking, Never seen. What am I? Answer: Air. — by Anonymous v2.