the pond water the watercress plants the minnows the crayfish
I am hesitating between 4 options to answer the following question, which option should I choose?
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?
Possibilities:
- the pond water
- the watercress plants
- the minnows
- the crayfish

the pond water