-  Air is taken through the mouth - Enters the lungs - The oxygen fills the sacs in your lungs - Carbon dioxide is removed from the lungs and exhaled  What might be the last step of the process?
Ans: The oxygen is pass throughout your body.

-  Someone is infected with bacteria - That bacteria begins to grow and reproduce inside the cells - The dividing bacteria begin to make toxins - Those toxins damage your cells  What might be the last step of the process?
Ans: Disease symptoms may begin.

-  Oil is gathered through mining operations - The oil is transported to stores - Oil is purchased by homeowners - Oil is placed into a stove in the house - The oil is lit on fire, and burns for a long time  What might be the last step of the process?
Ans: The warm air off of the oil travels through the house

-  Water from the surface seeps below the soil - The water comes into contact with the rock below - The rock over the years carves through the rock - The space in the rock becomes larger and forms into a cave  What might be the last step of the process?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Ans: As more rather rushes through the cave becomes a cavern.