A housing development is situated near a river that flows into a bay. Which of the following is an abiotic factor in the river that would directly affect the marine ecosystem in the bay?
a. The types of trees growing along the river bank
b. The types of sediment moving down river
c. The amount of houses facing the river
d. The amount of plant life in the river

Explanation:

An ecosystem is made up of two types of factors one is known as an abiotic factor and the other is known as an abiotic factor. Such types of factors that are made up of nonliving things are known as abiotic factors such as soil, temperature, sediment, and some others. The factors that are made up of living things are known as biotic factors such as plants, microbes, animals and some other.  Sediment is such type of material that is broken down by weathering, erosion and some other processes.