Read the passage below and respond to the question that follows.

Sudan and Egypt have quarreled for decades over a region called Hala’ib. This triangle of land along the Red Sea is rich in the mineral manganese, which is essential to iron and steel production. It is also used as an additive in unleaded gasoline. The Sudanese government claims the land rightfully belongs to Sudan, but it currently belongs to Egypt.

This reading describes a border dispute. What is the cause of this dispute?

Different political ideologies

Religious beliefs

Ethnic conflict

Natural resources

The given passage reveals the dispute between the countries Sudan and Egypt. The main issue of dispute was the strip of land of "Hala'ib", which is rich in manganese. This mineral is essential for the production of iron and steel, and also as an additive in unleaded gasoline.

The given border dispute shows that the main cause of the dispute may be the cause of natural resources. The presence of these natural resources led to the dispute between the nations of Sudan and Egypt. Thus, the correct answer is the fourth option.