Explain why the Ming Dynasty stopped overseas voyages. Please help I don't know the answer and its due tomorrow...

Several oil companies donate to a pro-fracking interest group after hearing that the federal government plans to pass a law banning fracking in the united states . the interest group then appeals to members of congress in attempt to get them to vote against the bill. which of the following democratic ideals does this scenario best exemplify? republicanism social contract natural rights limited government