The causes of the Great Depression were over speculation, over plating by farmers which made crop prices go down, people were over borrowing credit and not paying it, and people were also taking out loans and not paying those back
The purpose of the Lewis and Clark expedition in 1804-1806 was the first American expedition to explore the west, and map the newly acquired territory. They also wanted to find a practical route, and establish themselves. Studying the wildlife - plants, animals, etc - and establish trade with local indians was also an objective of the expedition!
It was primarily the <span>The Townshend Acts that were set in place by British Parliament that led to the Boston Massacre, since these acts called for the taxing of the colonists to pay the salaries of governors and judges in the colonies who were loyal to Britain.</span>
A because they are always needed in every situation.
Scribes, the name even suggests it from latin :)