input: Please answer the following: What is the missing first step of the following process:  -  The cells of the lung hold the air - They take in the air and remove the Oxygen - They inflate and all the bad air leaves through the mouth - They do it all over again.
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output: They expand to take the air in

Please answer this: What is the missing first step of the following process:  -  The water will turn into water vapor - Collect the water vapor - Allow the water vapor to cool - The water vapor will turn into liquid water - The salt will be separated from the water.
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Answer: Boil salt water

Problem: What is the missing first step of the following process:  -  The trees and plants burn - The animals lose their homes - If the animals can not escape, they may die from smoke inhalation - The plants that provide food are gone - The animals have little to eat -

A: A forest fire starts

Problem: Given the question: What is the missing first step of the following process:  -  Some is reflected back into space - The rest of the energy is absorbed by land and oceans, heating the Earth - Heat radiates from Earth to space - Some of this heat is trapped by greenhouse gases in the atmosphere - Human activities such as burning fuel are increasing the amount of greenhouses gases - This causes more heat radiation to stay trapped in our atmosphere - The Earth's temperature rises -
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The answer is:
Solar radiation reaches Earth's atmosphere

input 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.???
output answer: Magma cools inside the crust

input question: What is the missing first step of the following process:  -  Water is poured into the well of the machine - A filter is placed in the basket - Ground coffee is measured into the filter - Turning on the machine starts the water heating - The hot water rises up - The water drops into the ground coffee - The hot water passes through the grounds - The coffee drips into the pot from the basket.???
output answer:
The coffee pot is filled with water