Ancient Dissapear SURROUNDINGS Swirl Abandon Enemies Ancestors Pit houses High-altitude Dwellings Ledges Cultivate Protection Ladders Ruins Neat Lightbulbs Conserved Climate Dams Reservoirs Concave

1. ________ protection, ancient people built pit houses and high-altitude dwellings to stay safe. a) Without b) With c) Within d) Against 2. The ancestors who lived in the ruins left behind ladders to climb to the ledges, but they have now ________. a) Descended b) Vanished c) Appeared d) Elevated 3. The underground chamber was used to ________ crops during times of drought. a) Abandon b) Erode c) Cultivate d) Migrate 4. The neat ancient lightbulbs were ________ by the conservationists for future generations to see. a) Created b) Destroyed c) Conserved d) Built 5. Many tribes ________ to other regions because of physical changes in the climate. a) Migrated b) Disappeared c) Appeared d) Disintegrated