What are the main components of a nation-state?

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.

Residents of moldova are mainly a. russian b. ukrainian c. serbian d. romanian the answer is d. romanian

Many rivers in central asia come from