The African American population of cities in the norther states blank
the
during blank

The correct answer is kettles.

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

Maybe on the physical part? i dunno i just guessed plus i really need the points

The correct answer is:   [b]:   "physical systems" .