What was the foreign policy that america followed at the beginning of world war i? what
did this lead to and why?

America followed a neutral policy and was convinced that United States must stay away from the internal conflicts of Europe.

However, this stance weakened the European nations such as United Kingdom, France, Belgium agains the central powers. Without proper military and geopolitical support from the USA, the allies found it difficult to defeat the Germans, Austrians and the ottomans.

Explanation:

i honesty don't know, good luck tho dawg

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.