Which statement about Earth’s core helps explain Earth’s magnetic field? A: Earth’s core is composed of magnets.
B: Earth’s core is composed of iron and nickel.
C: The outer core is solid.
D: The inner core is liquid and moving.

Why are shark population in decline worldwide?

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.

Is an official language in every north african country