Answer:
An educated guess or a presumption based on review of the research literature
Explanation:
A hypothesis is an educated guess or a presumption based on review of the research literature.
It is a proposition based on reasoning without any assumption of its truth, it enables the researcher to have a better understanding about the subject matter of the study.
Push and pull factors
A push factor is a when someone gets pushed out there country such as when war is in occurance or since there isn't enough land
A pull factor is when someone is drawn to the new place such as new jobs and land
Because it was built on sand and some of it sunk, and changed due to erosion and weathering of the land
This would be B. negotiating with foreign nations. The other three have the would community in them or something similar. B is something the federal government would deal with.