There are 7 crystalline systems.
<span>triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic.</span>
Answer: C.) Exercising instead of being inactive
Explanation: All the other options are unhealthy and show poor self-discipline. Google defines self-discipline as the ability to control one's feelings and overcome one's weaknesses; the ability to pursue what one thinks is right despite temptations to abandon it. Option C shows a person with high self-discipline, instead of being inactive, they chose to exercise.
The answer is Magnesium, if that’s a option.
