What’s the answer to this

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

"d.) carbon dioxide and hydrogen sulfide"

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

black

lasagna

lunch

math