Please choose the correct answer to the question: Why should plants be included in investigations about the water cycle?

Answer1: Plants speed up the water cycle by removing carbon from the air. Answer2: Plants start the water cycle when they make water in photosynthesis. Answer3: Plants are part of the water cycle through the process of transpiration. Answer4: Plants stop the water cycle because they absorb it and stop the flow to streams.

Answer format: answer1/answer2/answer3/answer4