Problem: Given the question: What is the missing first step of the following process: - The heated water evaporates - The salt is left behind - The evaporated water condenses on a cold surface - The evaporated water is collected - The process is repeated - More salt is removed from the water.
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The answer is:
Water is heated

Problem: Given the question: What is the missing first step of the following process: - Water droplets are in clouds - The air gets cold - Water droplets turn into ice crystals - Ice crystals in clouds stick together and become snowflakes.
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The answer is:
Water evaporates from the ground up to the sky

Problem: Given the question: What is the missing first step of the following process: - That bacteria begins to grow and reproduce inside the cells - The dividing bacteria begin to make toxins - Those toxins damage your cells - Disease symptoms may begin.
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The answer is:
Someone is infected with bacteria