<span>The Africa and South America continents were once connected as one continent before the separation that caused the formation of the Atlantic ocean</span>
So basically, pan-Arabism was an ideology closely to Arab nationalism, where Arab nations call for unity among Middle Eastern and North African countries. It's like, we share a common language, history, etc., so why not we be unified? And no, it was not successful. There are many conflicts within the Middle East today between Arab governments.
Trade barriers come in many forms. Quota is one. This is when a country sets a limit to the imported products. This is done for a number of reasons. One is because the government of the importing country wants to protect its domestic manufacturers. Other barriers or limitations are added costs such as tariffs, duties, and taxes.
Surfman is the term used to describe a member of the United States lifesaving forces, namely one from the coastguard.