The increased concentration of suspended solids in water and their accumulation onbottoms where they are undesirable, creates what kind of water pollution?

Correct option is A

1. Siltation is primarily caused by soil erosion due to human activities like deforestation and agricultural runoff.
2. The accumulation of silt in water bodies can reduce the amount of light that penetrates the water, affecting photosynthesis in aquatic plants.
3. Siltation can cause the suffocation of aquatic life, particularly fish and other organisms that rely on clean substrates.
4. It impacts the water's ability to hold oxygen, thus harming aquatic ecosystems.

Additional Knowledge:

• Microbiological pollution: This refers to the presence of harmful microorganisms such as bacteria, viruses, or protozoa in the water, which can cause diseases like cholera or dysentery.
• Nutrient pollution: This occurs when excessive amounts of nutrients, mainly nitrogen and phosphorus, enter water bodies from fertilizers and sewage, leading to eutrophication and the growth of harmful algal blooms.
• Thermal pollution: This type of pollution happens when industrial processes or power plants release warm water into natural water bodies, disrupting aquatic ecosystems by increasing water temperatures and reducing oxygen levels.