Answer:
by pushing the Soviet Union to remove missile sites from Cuba
by having the US Navy surround Cuba to create a quarantine
by making certain that no additional missiles were shipped to Cuba
Step-by-step explanation:
President Kennedy intervened in the Cuban missile crisis which was caused by the Soviet Union. He ensured that the US navy surrounded Cuba to create a form of quarantine. This was done and it ensured that no additional missiles were shipped to Cuba. Some of the missiles and the sites were also destroyed. The Soviet Union however agreed to remove all the missile sites when an agreement about the US granting Cuba territorial sovereignty was met.