Answer: They gave evidence to his assertion that forest logging was on the rise
Explanation:
John Muir was one of America's most famous environmentalists. He was known as the Father of National Parks due to his influence in the setting up of National Parks by the Federal Governments to protect forests and its inhabitants.
John Muir wrote a couple of articles on the need to preserve forests in the United States including ''Hunting Big Redwoods'' where he talked about how rare and old some of these trees were. He spoke of how people had began to cut trees in larger numbers and how more and more forests were now subjected to logging since the Colonists arrived in America.
The map supports his assertion by showing how there are more areas of forest being logged in 1920 than 270 years earlier in 1650.
The causes of the Great Depression<span> in the early 20th century are a matter of active debate among economists, and are part of the larger debate about economic crisis, although the common belief is that the </span>Great Depression <span>was triggered by the 1929 crash of the stock market.</span>
Because despite the 15th Amendment, due to Reconstructions' failure, many States and localities were allowed to create racist voting laws that kept African-American men from voting.
These laws were eventually remedied by the Voting Rights Act, which wasn't passed until 1965.