I believe the term you are looking for is Manifest destiny. It was a widely held belief in the United States that American settlers were destined to expand throughout the continent.
Answer:
I beleive this will help....
The theme of a story is the universal idea that can be deduced by the readers from the narrative and its described by the literary symbols that keep on appearing in course of the narrative.
Hope it helps!✌
Explanation:
Heres what i got
15.a
16.d
17.c
18.d