Please help asap! I will mark you as brainliest :)

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 poles appear to be slightly flattened in a robinson projection. question 1 options: true false

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer