What does the aquifer have to do with water pollution?

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

The desert expands by hundreds of square miles each year.

Geographers most often use this type of map to study the characteristics of regions such as population and naturalresources because blank spaces are put into the map to prevent distortion.feelperfet