According to the text physical exercise in late adulthood encourages the birth of new neurons in areas responsible for learning an memory. in other words, exercise facilitates in the

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.

thats not a question