Environmental concerns related to mining in Meghalaya include:

Deforestation
Water pollution
Air pollution
All of the above

The correct answer is: d) All of the above.

Mining can have a significant impact on the environment, including deforestation, water pollution, and air pollution.

Deforestation is the clearing of forests to make way for mining operations. This can lead to the loss of habitat for wildlife, as well as the disruption of water supplies and the erosion of soil.

Water pollution can occur when mining operations contaminate water sources with sediment, chemicals, and heavy metals. This can make water unsafe for drinking, bathing, and irrigation.

Air pollution can occur when mining operations release dust, fumes, and other pollutants into the air. This can cause respiratory problems for people living near mining sites.

In addition to these environmental concerns, mining can also have a negative impact on the social and economic well-being of communities. Mining can lead to the displacement of people from their homes, as well as the loss of jobs and traditional livelihoods. It can also contribute to social unrest and conflict.

Despite the risks, mining can also have some positive impacts on the economy and society. Mining can create jobs and generate income, and it can also provide resources that are essential for development. However, it is important to carefully weigh the potential benefits and risks of mining before undertaking any new projects.