One reason Mexico's geography helped the rise of drug cartels is?

A) Mexico shares a border with the United States

Explanation:

United States have higher average compared to Mexico. (Average Americans typically earns two times more compared to Average Mexicans for the same job)

The average price for a same product in United States is far higher compared to the price of product in Mexico. So, by producing the drugs in Mexico and sell it to United States, drug cartels can obtain high amount of profit margin. This what cause the rise in Drug Cartels.

what words? are you talking about to complet what sentence

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.