The north of the US did not want slavery while the south did want slavery. they had a war over it (the civil war) the north won and slavery was abolished.
The answer is "Experimental research".
Experimental research refers to any research led with a scientific approach, where an arrangement of variables are kept steady while the other arrangement of factors are being estimated as the subject of test.
The most straightforward case of an experimental research is leading a laboratory test. For whatever length of time that examination is being directed under logically satisfactory conditions – it qualifies as a trial explore. A genuine experimental research is thought to be fruitful just when the scientist affirms that an adjustment in the dependent variable is exclusively because of the control of the independent variable.
Answer:
County
Explanation:
This would be the most probable cause
Dig in the dirt near pyrimids and make sure to have a metal detector.
