a. tariffs: to protect domestic industry.
b. anti-fraud laws: to guarantee free choice.
c. environmental protection laws: to safeguard natural resources.
Tariffs are taxes that are placed on imports between states. They are often used as a way to protect domestic industry.
A fraud is a deliberate deception to secure some legal gain, or to deprive a victim of a legal right. Anti-fraud laws are passed to prevent and punish this type of behaviour.
Environmental protection laws are those that are created in order to protect natural ecosystems from human destruction.
Golden Horde was the name for the region. It was founded by Batu Khan, grandson to Genghis Khan. They were predominately known and feared for their military might. At its peak, they controlled most of eastern Europe.
Private citizens had to pay higher taxes for each runaway slave.