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winding - adj. curving
challenge - n. to test the ability, skill, or strength of (someone or something)
drought - n. a long period of time during which there is very little or no rain
glacier - n. a very large area of ice that moves slowly down a slope or valley or over a wide area of land
irrigation - n. to supply (something, such as land) with water by using artificial means (such as pipes)
remote - n. far away from other people, houses, cities, etc.
scarcity - n. a very small supply
