input question: What is the missing first step of the following process: - The liver uses chemicals and proteins to treat the blood - The blood is cleaned - Energy is produced - The blood leaves the liver cleaned.???
output answer: Blood is sent to the liver

What is the missing first step of the following process: - The roots of the growing plants start to break up the rock - The plant acids dissolve the rock - The rock is broken down into smaller pieces - Erosion begins.
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Answer: Plants start growing on or near the rocks

Q: What is the missing first step of the following process: - As the saltwater is heated the water becomes a gas - The salt particles sink to the bottom of the container - Gaseous water is piped into another container - Allowed to cool - The salt particles are left behind in the first container - The second container contains fresh water.
A: The salt water is heated

Question: What is the missing first step of the following process: - An electrical source, like a battery, produces an electrical current - The electrical current flows through the wire - The electrical current creates a magnetic field around the wire, magnetizing the metal - The magnetic field can be turned on and off by starting or stopping the electricity source -
Answer: A conducting metal, like copper, is wrapped around a piece of metal

[Q]: What is the missing first step of the following process: - Is exposed to air - A chemical reaction occurs - The iron starts to oxidize - The iron starts to rust.
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[A]: Iron is exposed to oxygen

Problem: Given the question: What is the missing first step of the following process: - Magma crystalizes - Lava cools on the surface - Lava crystalizes - Minerals dissolved in water crystlize.
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The answer is:
Magma cools inside the crust