anyone know any unblocked games on a school chromebook school is ringlardner in MI please tell me sum fun 1 s also my question so diss dont get deleted :
How did the physical environment of river valleys negatively impact ancient civilizations?
O The land was attractive to people outside invaders who wished to conquer the land.
O Rivers prevented the people from moving because they could not cross them.
O Occasionally extreme flooding caused great damage and killed many people.
O Silt in the rivers made the water dirty and possibly unsafe for people to drink.
