Westward expansion meant that the US acquired ever increasing amounts of land, and needed people, farmers, to settle there so it could maintained without a huge military presence
Answer:
b)a pattern
Explanation:
Because he saw the pattern of movement of Jupiter repeatedly
Dr luceros team used looters trenches rather than dig new ones because they wanted to protect the site from further damage. This is because to prevent further destructions from their activity.
The answer would be : <span>volcanism.
Hope this helps !
Photon</span>
