Which of these events occurred in 1519? a. columbus landed on an island in the caribbean. b. cortés and his army arrived in mexico from cuba. c. spanish friars began building missions in texas. d. cabeza de vaca shipwrecked on malhado.

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.