Question

Acid rain produced when rain mixes with gases such as sulphur dioxides. This will eventually result in:

• A. lowering of pH and change of temperature in ponds
• B. raising of pH in ponds, encouraging growth of microorganisms
• C. lowering of pH in ponds, limiting survival of aquatic organism
• D. raising of pH in ponds, limiting development of organisms

Answer 1

The correct option is C lowering of pH in ponds, limiting survival of aquatic organism

Acid rain flows into streams, lakes, and marshes after falling on forests, fields, buildings, and roads. Acid rain also falls directly on aquatic habitats. Most lakes and streams have a pH between 6 and 8, although some lakes are naturally acidic even without the effects of acid rain.

Acid rain primarily affects sensitive bodies of water, which are located in watersheds. Lakes and streams become acidic (i.e., the pH value goes down) when the water itself and its surrounding soil cannot buffer the acid rain enough to neutralize it
Acid rain causes a cascade of effects that harm or kill individual fish, reduce fish population numbers, completely eliminate fish species from a waterbody, and decrease biodiversity.

Hence, option $C$ is correct.