Who forced the rwandans to grow coffee?

Belgian

Rwanda's coffee history dates back to the 1930s when the Belgian colonial empire forced Rwandan farmers to plant an abundance of coffee trees. This ultimately created a 'low-quality/low-price' trap which was a bane for the entire nation

Explanation:

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.

food chain i would say only because there is competition on getting food and survival