For what reasons does a monsoon change direction twice a year?

Which event had the greatest impact on culture of south america

Rectangle qrst is shown. angle qrt is congruent to angle str, and angle str is complementary to angle qtr. which statement is true about angles qrt and qtr? they are congruent. they are complementary. they are supplementary. they are right angle

Horizon a is also sometimes called a. topsoil b. subsoil c. bedrock d. weathered bedrock