Why did mesopotamia have especially fertile soil? a: the soil was enriched by the ashes from nearby volcanoes. b: topsoil washed down from the mountains and flooded the land. c: the people put fish from the river in the soil as they plowed. d: the farmers let their animals graze in the wet soil, to trample and eat the weeds.

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)

in londan the most because it was one of the growing countries