Why were the Indians necessary to the missions why?

Where is Lake Forest located? What products did san Luis rey make? What river is located in europe? Did Michelangelo have help paint the ceiling of Sistine Chapel? Why do camels cacti sagebrush lizards snakes and insects all live together in a section of desert? Can you drink in public parks or beaches in California? About three-fourths of earth surface is covered with water. Why then is there a shortage of water? Who was the first indian to climbe mount everst.when did he did so? How far from Louisville KY to Mt Rushmore SD? What is Global media flows? 5 reasons the great lakes stlawrence lowlands are so populated? When why and where was the Great Wall of China built? What is wave movement? Is the Popocatepetl near a ocean? Who was removed from the Tomb of the Unknown Soldier? Where is mission San juan bautista located? What is the difference between river and reservoir? What does Parana want her life to be like? What does the ocean of the depth called? What materials are used to build the bridge?