Answer:
The Spanish-American War influenced the emergence of the United States as a world power in two key ways:
Step-by-step explanation:
The first way is that it showed the military prowess of the U.S., a relatively young nation at the time (a little over 100 years old), against a much older nation, Spain, that had been a world-encompassing empire just a century earlier.
The second way is that it gave the United States possession of some of its first territories or colonies: Cuba, Puerto Rico, and the Phillippines. These made the United States an Empire, that had colonies just like the old European Empires like Britain and France.