Which of the Following Would Contain the Lowest Concentration of Oxygen

Question

Which of the following would contain the lowest concentration of oxygen?
A)a lake covered by a sheet of ice
B)air at sea level
C)air in a refrigerator
D)a pond during summer

Accepted Answer

Ponds during summer can experience high levels of organic matter decomposition, leading to the consumption of oxygen by bacteria and other organisms. This can result in low oxygen concentrations in the water.