Subsidence in areas underlain by organic (swampy)soils is due in part to
A) a high water table.
B) bacterial decomposition of organic material to CO₂.
C) infusion of CO₂.
D) irrigation.
E) river flooding.

Question

Quizplus · Accepted Answer

Subsidence in areas underlain by organic soils is largely due to the bacterial decomposition of organic material to CO₂. This process can cause the ground to sink and result in soil instability.

Answer: A 
 A high water table can also contribute to subsidence in areas underlain by organic soils, as the weight of the water can compress the soil and cause sinking.

Subsidence in Areas Underlain by Organic (Swampy)soils Is Due in Part