input question: What is the missing first step of the following process:  -  Once in the lungs, oxygen is moved into the bloodstream and carried through your body - At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide - Your bloodstream then carries this waste gas back to the lungs where it is removed from the blood stream and then exhaled - Your lungs and respiratory system automatically perform this vital process, called gas exchange -???
output answer: He air we breathe contains oxygen and other gases

input question: What is the missing first step of the following process:  -  As the plates move, they exert a great force - When the force is large enough, the crust breaks - The stress is released as energy - The energy moves through the Earth in the form of waves - We feel the earthquake -???
output answer: Plates on the Earth&#x27;s crust move slowly past each other

input question: What is the missing first step of the following process:  -  Cells with chlorophyll in them capture the light energy - Plants absorb carbon dioxide through their stoma - Plants absorb water through their roots and other parts of themselves - Plants absorb minerals through their roots - Plants convert these inputs into sugars - Sugars can be used as energy sources - Oxygen and water are also produced - Excess water and oxygen are released through stoma and other parts of the plant.???
output answer: Sunlight shines on plants

input question: What is the missing first step of the following process:  -  The sperm implants itself into the egg - The sperm and egg form a zygote on the wall of the uterus - The fetus grows and develops - The woman gives birth to a baby - The baby is raised by parents until it is able to take care of itself - The person goes out into the world and finds a job - The person meets other people and has a life - The person gets a career, and gets married - The person retires and eventually passes away -???
output answer: