Sulfur dioxide . A.) creates a reddish-brown haze in the sky
B.) is a secondary air pollutant
C.) has an irritating odor and is colorless
D.) is relatively harmless to the environment
Answer is C

C.) has an irritating odor and is colorless

Explanation:

Sulfur dioxide is a chemical compound that's very toxic, non-flammable, colorless, and has a pungent odor. It's chemical formula is .

the answer is d. chordata

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.