Explanation
The land that has been destroyed due to mining activity is called (b) Derelict land.
Derelict land refers to land that has been left in a damaged, degraded, or unproductive state as a result of past industrial activities, including mining. It typically refers to areas where mining operations have ceased, leaving behind scars, spoil heaps, and other forms of environmental damage.
Mining activities can lead to the destruction and alteration of landscapes, including the removal of vegetation, soil erosion, and contamination of water bodies. These impacts can render the land unfit for productive use or pose environmental hazards.
Derelict land often requires remediation and rehabilitation efforts to restore its ecological integrity and make it suitable for future use, such as reforestation or land reclamation projects.
Therefore, the correct answer is (b) Derelict land.