Question

as bod (biological oxygen demand) increases, aquatic organisms have a harder time breathing. what does an increase in bod do to the amount of dissolved oxygen in water? does not change it significantly decreases it greatly increases it slightly increases it

Explanation:

Biological Oxygen Demand (BOD) is a measure of the amount of dissolved oxygen that aerobic microorganisms need to break down organic material in water. When BOD increases, it means there is more organic matter for microorganisms to decompose. These microorganisms consume dissolved oxygen during decomposition. So, an increase in BOD leads to more oxygen consumption by microorganisms, which in turn reduces the amount of dissolved oxygen available in the water.

Answer:

significantly decreases it