What is a greenhouse gas?(1 point)

Responses

a gas that forms a physical barrier to block escaping heat
a gas that forms a physical barrier to block escaping heat

any gas in the troposphere that absorbs and re-emits infrared radiation
any gas in the troposphere that absorbs and re-emits infrared radiation

any gas in Earth's atmosphere
any gas in Earth's atmosphere

a gas at higher temperature than the surrounding atmosphere