a trophic level a limiting factor a territorial boundary a food-chain component
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The Halifax River has a major flood plain in Port Orange, Florida. Minerals are deposited into the soil of the flood plain when the water overflows the banks of the river. These minerals can reduce the absorption of the soil in the flood plain and affect the growth of plants in the area. Which best describes the role of the deposited minerals in the flood plain ecosystem?
Possibilities:
- a trophic level
- a limiting factor
- a territorial boundary
- a food-chain component

a limiting factor