In the us government citizens play a key role in

Elections

Explanation:

The United States is a representative democracy, which means that the citizens of the country have the right to participate in politics by electing representatives. Therefore, the most important and significant role that citizens play in American politics is that of participating in elections. Citizens play a key role in elections because this is the moment when they are able to deeply influence politics by choosing representatives that closely align with their beliefs and interests.

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.