Which statement is true concerning the planets’ orbits?

all planetary orbits are identical in size.
all planets revolve around the sun at the same speed.
all planetary orbits are elliptical.
some planetary orbits are irregular in shape.

Suggest two reasons why irrigation is important for human development of the desert

The causes of the failure of the league of nations

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.