Which of these is a negative effect of using too much water for the irrigation of crops?
a. depletion of oxygen in the water
b. increased deposition of sediments upstream
c. slowed erosion due to the slowing of water flow
d. harming the plants and animals in river ecosystems

Eysyksykfrkueykeukdlurukdlurlurlurlurulluruekukelrueukluryekkey

Canada plays an important role in the global community in all of the following ways except by a. acting as a superpower with influence over europe and asia. b. promoting arms control and disarmament. c. working with the commonwealth of nations to promote trade. d. promoting trade with japan and other asian countries.

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.