Sand mining along the coast can cause:

The correct answer is: d) All of the above

Sand mining along the coast can cause a number of problems, including:

• Beach erosion: Sand is a vital part of beaches, as it helps to protect them from erosion. When sand is removed from beaches, it can lead to the loss of sand dunes, which are important for protecting coastal communities from storms and flooding.
• Loss of biodiversity: Sand dunes are also home to a variety of plants and animals, and when they are lost, so are the species that depend on them.
• Saline intrusion into groundwater: Sand dunes help to protect groundwater from seawater intrusion. When sand is removed, it can allow seawater to seep into groundwater, making it unusable for drinking or irrigation.

In addition to these problems, sand mining can also have a negative impact on the local economy. Beaches are a popular tourist destination, and when they are eroded, it can lead to a loss of tourism revenue. Sand mining can also damage fishing and other marine industries.

For all of these reasons, it is important to carefully consider the environmental impact of sand mining before undertaking any projects.