Final answer:
Sierra Leone was the least-developed country as of 2010 based on the United Nations HDI.
Explanation:
The least-developed country in the world as of 2010 was Sierra Leone, according to the United Nations Human Development Index. Sierra Leone was classified as the lowest developed country globally, with limited opportunities and an economic base centered around agriculture. This designation is based on criteria such as combined income levels, human assets, and economic vulnerability.
Learn more about Least Developed Countries in 2010 here:
https://brainly.com/question/36679614
