Please choose the correct answer to the question: A spring-fed stream forms a pond that contains watercress plants, minnows, and crayfish. The pond receives 5 hours of direct sunlight every day. Which of the following is an abiotic factor in this ecosystem?

Answer1: the pond water Answer2: the watercress plants Answer3: the minnows Answer4: the crayfish

Answer format: answer1/answer2/answer3/answer4
Answer: answer1