Which of the following is a cause of urbanization?

a. living in cities became more expensive than living in rural areas.
b. agricultural production became more efficient.
c. suburban homes became larger than urban homes.
d. paving over land changed the environment.

The answer for apex is b.

all answers true and false

explanation:

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.