Sand mining in rivers can lead to:

The correct answer is: d) All of the above

Sand mining in rivers can lead to a number of negative environmental impacts, including:

• Erosion of riverbanks: When sand is removed from a riverbed, it can destabilize the riverbanks and lead to erosion. This can cause the river to widen and deepen, which can damage infrastructure and make it more difficult for fish and other aquatic life to survive.
• Loss of aquatic habitat: Sand mining can also lead to the loss of aquatic habitat. When sand is removed from a riverbed, it can destroy spawning grounds and other important areas for fish and other aquatic life. This can have a devastating impact on fish populations and other ecosystems.
• Lowering of water table: Sand mining can also lower the water table. This is because sand helps to filter water and prevent it from seeping into the ground. When sand is removed, the water table can drop, which can lead to water shortages and other problems.

In conclusion, sand mining in rivers can have a number of negative environmental impacts. It is important to be aware of these impacts before engaging in sand mining activities.