input question: What is the final step of the following process: -  A fuel is heated in an oven - Above the oven is a tank of water that is sealed - The tank of water begins to boil above the oven - A the water boils steam is created - The steam is denser than air so it needs a place to go - The steam is forced out of the tank and into a piston - The piston moves up - The valve of the piston closes - The valve on the next piston opens???
output answer: The steam fills the next piston, driving it up, and the other one down

input question: What is the final step of the following process: -  Bread is exposed to the elements - Bread absorbs water from the air - Bread absorbs warmth from the air - Dust particles with mold spores fall on bread - Mold spores start to consume the bread for energy???
output answer: Mold colonies grow until they are visible.

input question: What is the final step of the following process: -  A red giant burns mass - This mass creates high core temperatures - The mass decreases - The red giant can no longer fuse the carbon and oxygen in its center - The gravity of the star can no longer hold the outside layers - The layers break away - Only the inner core remains???
output answer: This inner core is known as a white dwarf.

input question: What is the final step of the following process: -  Humans are born as babies - Babies become infants - Infants become children - Children learn skills - Children become teenagers - Teenagers undergo puberty - Teenagers become adults - Adults have children - Adults become elderly???
output answer: