Answer:
Vegetation cover.
Explanation:
Planting vegetation over the mined area is the best solution that provide the largest benefits to society and the environment with low cost as compared to other solutions for reclamation such as refilling the land with soil and filled water to make a lake. Vegetation over mined area clean the environment as well as provides timber in few years which is used for making different products. So vegetation is the best solution for reclamation of mined area.
You could name it two ways! You can either do IH or HI. Since there are only two letters, you can only rearrange or name IH 2 different times.
Hope this helps :)
