Amilitary tactic through which ports are shut off to keep people or supplies from moving in or out

A military tactic through which ports are shut off to keep people and or supplies from moving in or out is called a blockade. A blockade is usually directed at an entire country or region and is  different  from a siege which targets a fortress or a city. It is also distinct from  an embargo or sanctions, which are actually legal barriers to trade.

While most blockades in history took place at sea , blockades were also used on land to prevent someone from coming into a certain area. In the 20th Century, air power has also been used to enhance the effectiveness of the blockade by halting air traffic within the blockaded airspace.

answer: president kennedy is vowing to protect freedom in this paragraph.

fearing kabuki could corrupt the nation’s morals, japanese government officials

explanation:

the national morals was so the japanese and the kabuki would stop fighting