Answer:
oil
Step-by-step explanation:
oil is the short answer
Sudan holds 5,000,000,000 barrels of proven oil reserves as of 2016, ranking 23rd in the world and accounting for about 0.3% of the world's total oil reserves of 1,650,585,140,000 barrels. Sudan has proven reserves equivalent to 97.8 times its annual consumption.
worldometers
its money is called South Sudanese pound
wikipedia
1 dollar is worth 130.26 South Sudanese pounds SSP
mataf
It got independence from Sudan on 9 July 2011
wikipedia
About 82% of the population in South Sudan is poor according to the most recent estimates, based on the $1.90 2011 purchasing power parity poverty line
world bank
Sudan has a largely traditional economy in which the majority of the citizens rely on agriculture, and there is limited central planning by the government. Sudan is a member of the League of Arab States (Arab League) and the Common Market for Eastern and Southern Africa (COMESA).
global edge