Final answer:
The United Nations responded to Iraq's invasion of Kuwait by imposing a trade embargo and passing resolutions condemning Iraq's actions.
Step-by-step explanation:
The action that the United Nations took in response to Iraq's invasion of Kuwait was to issue a trade embargo on Iraq.
By imposing a trade embargo, the UN prohibited member countries from conducting any business or trade with Iraq, including the sale of oil. This was done to economically isolate Iraq and put pressure on them to withdraw from Kuwait.
Additionally, the United Nations passed a series of resolutions condemning Iraq's actions and demanding its immediate withdrawal from Kuwait.
Learn more about United Nations response to Iraq's invasion of Kuwait