Minerals may form on earth’s surface when
a. magma heats a solution.
b. crystallization is delayed.
c. solutions evaporate.
d. pure metals are present

The correct answer is option C; solutions evaporate

Explanation:

A mineral is formed when the solution in which it is dissolved just evaporates leaving behind magma for crystallization. The solution containing large amount of dissolved solid is warmed in an open container and  the solvent  is allowed to evaporate thereby leaving behind   a saturated solution which on further evaporation leads to the production of crystals

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.