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