Which question can be answered by an experiment? A)
Do sugar substitutes cause cancer?
B)
Did an ice age kill off the mastodons?
What caused the extinction of the dinosaurs?
D)
Are all people susceptible to the Hunta virus?

b. the carbon cycle ensures living things have a source of hydrogen

the dark variety, as they are not visible on the dark tree barks

explanation:

sorry, but you do not have posted the diagram.

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: