Generate a sentence that answers this question: "Which creature is built to move though wet currents?".

Answer: swimming is when humans can move in water

Generate a sentence that answers this question: "What can show how a rainbow is formed by refraction of light by splitting light into all different colors?".

Answer: a rainbow is formed by refraction of light by splitting light into all different colors

Generate a sentence that answers this question: "A stopwatch is helpful".

Answer:
a stopwatch is used to measure time