In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Which is an example of water condensing? Answer: Dew forming on plants during a cold night
Dew forming on plants during a cold night is an example of water condensing.

Question: Which of these can be mined from Earth and used as an energy source? Answer: Coal
Coal can be mined from earth and used as an energy source.

Question: Why is the drift velocity negligible? Answer: many free charges

Many free charges is the drift velocity negligible.