Final answer:
A banana republic is a term coined to describe countries with a single export crop and a political system controlled by foreign entities.
Step-by-step explanation:
A phrase coined to describe countries with a single export crop and a political system that is controlled by foreign entities is banana republic. It originated from the early 20th century when American fruit companies dominated the economies of certain countries, particularly in Central America, which relied heavily on exporting bananas. It refers to countries heavily dependent on exporting bananas and often implies economic dependence, political instability, and limited diversification.
The term implies that these countries' economies are heavily dependent on a single crop and are under the control or influence of foreign companies. This economic model often leads to inequality, political instability, and limited economic diversification.