Generate a sentence that answers this question: "A reflective surface fogging up is".

Answer: a phase change is when matter changes from one state into another state

Generate a sentence that answers this question: "we only have diamonds because of the existence of".

Answer: heat and pressure change the remains of prehistoric living things into natural gas

Generate a sentence that answers this question: "The last stage of the water cycle is collection, after that is evaporation when water is transformed to vapor. What happens next?".

Answer:
evaporation is when water is drawn back up into the air in the water cycle