Which type of air pollution was caused by factories during the Industrial Revolution? smoke from burning coal
soot from forest fires
smog from high pollen levels
smoke from vehicle exhaust

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

the answer would be a).