Since the beginning of the 21st century, bogota has successfully developed what two alternatives to the automobile as methods of moving people around the city? a. ride sharing apps and subway lines b. subway lines and bus rapid transit c. bicycle lanes and ride sharing apps d. bus rapid transit and bicycle lanes

Which of there factors contributed most to us westward expansion in the second half of the nineteenth century?

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

Mosses, lichens and shrubs can be found where in russia? a.grasslands b.mountain regions c.coastal plains d.siberian tundra