Why do geographers divide Africa into two separate regions

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

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.

Find the area of the shaded region.