What geographic feature in North Africa served as a barrier separating it from the rest of the continent?

the sahara desert serves as a natural barrier that separates it from the rest of the continent

all persons entering into t

he employment of the compan

y, are considered as engaged

for twelve months, and those who leave

sooner, or do not comply with all these

regulations, will not be entitled

to a regular discharge.  

“a committee reviews the bill and marks it up to make it more viable and to reflect interests