Question

How can the mantle flow by convection if it is a solid?

Answer 1

The mantle is a movable solid just like play dough that's why it can move.

Step-by-step explanation:

Answer 2

Mantle convection is the very slow creeping motion of earth's solid silicate mantle caused by convection currents carrying heat from the interior to the plants surface. This hot added material cools down by conduction and convection of heat