Which of these is not a problem facing the many African nations? borrowing billions and not being able to repay
growing too much food
disease and lack of good medicine
tribalism

(D) tribalism

Explanation:

Tribalism is a lifestyle in which the population was gathered into a lot of small groups of people rather than one big society.

Even though it's true that it's exist in Africa, they're not necessarily considered as a problem. It's true that some tribes might engaged in conflict from time to time. But these conflicts are not particularly unique to Africa. Even developed countries experience a couple of conflicts between different social group.

For Untied States , one example of this would be a recent conflict between a group called Antifa vs Proudboys

if you are on the computer you can not take a picture but you can upload one but i am not sure about phones but i'm pretty sure it's the but to upload one just click the paper clip looking thing/ link thingy thing and upload a pic