Answer:
Plant life
Explanation:
John Muir was a researcher of plants.
Sadness and depression, and why he felt like that.
Definition of imperialism
imperial government, authority, or system
the policy, practice, or advocacy of extending the power and dominion of a nation especially by direct territorial acquisitions or by gaining indirect control over the political or economic life of other areas
broadly : the extension or imposition of power, authority, or influence
<em>Hope that helps!!!</em>
