They can keep organ tissue alive for transplantation.
The answer is red for the highest surface temp of a star.
The purple circular structures are the nucleus.
After mining, to reclaim the land, the depression is filled with rocks then the top is filled with loosely graded soil. Introduction of early succession plants is important before big trees can grow. The early succession plants help in the breaking down of the rocks into soil hence making the topsoil deeper to support trees.
