To encourage domestic stability and promoting a free market economy.
They are more commonly known as the bill of rights.
Out of the choices given here. the Constitution reflects the principle "republicanism" because it divides the legislative branch into two houses of elected officials.
The answer to the first question is: the king of India, he never conquered India. The answer to the second: Phalanxes. The phalanxes were based on the usage of long spears, that would stop the enemy advancing.