What is the most ethnic group of north africa?

the largest ethnic groups in North Africa are Arabs, Berbers and West Africans. I hope this helps :P

sediment layers stop spreading when they reach a barrier or they run out of sedimentary material. lateral spreading is the movement of gently to steeply sloping, saturated soil deposits caused by earthquake-induced liquefaction. i hope this . : )

1."lessen the worth of ."

2."increase the worth of."

3." beyond the worth of."

4."against the worth of ."