Third planet is earth.. which has it's atmosphere and support life.,.
that's very different from all other planets<span />
Explanation:
Tillage and other practices performed up and down field slopes creates pathways for surface water runoff and can accelerate the soil erosion process. Cross-slope cultivation and contour farming techniques discourage the concentration of surface water runoff and limit soil movement.
Answer: D
Explanation: Nationalism has unified those who share a common language.
(Other answers are completely wrong as answer A has nothing to do with Nationalism, B is irrelevant as Communism is on the opposite side of the ideological/political spectrum as to Nationalism, and C is completely wrong because Nationalism is based off the pride of one single ethnicity, not multiple.)
