These changes are an example of the growth of a forest through ecological succession.
<h3>What is ecological succession?</h3>
Ecological succession refers to the structure in which the species and habitat over an area changes over a given period of time. It is the evolution of the new plants and animals over that area.
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In the above case, The plant life in the Mount St. helens will evolve again after 100 years which destroyed due to the volcanic eruptions in the year 1980. Thus this process is known as Ecological succession.
Through this process regeneration of the plants and wildflowers will take place and gradually the trees, plants, shrubs, species and creatures will settle there.
Learn more about the plant life here:
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Because they wanted more opportunities and an end to isolationism. I hope I helped.
U.S. had desperately tried to stay neutral, but ties to Britain, propaganda, the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U.S. pushed the U.S. to getting involved.
Its the second one i think have it checked i might be wrong :)