In which layer of earth’s interior does convection occur? a. crust b. mantle c. outer core d. inner core

Earth convection occurs at the mantle layer

Explanation:

The movement of less dense material  above the more dense material  is called as convection.  The mantle is the layer that lies between the core and the crust of the earth. The mantle is composed of rocks containing silicon, magnesium, oxygen,  aluminium, iron and other minerals.

The heat energy of the core is transmitted  to the rock in the lower mantle.  This makes the rock with less temperature that lies  in  upper mantle to move down slowly.  Now the rocks that are pushed up  is eventually cooled and again pushed down by the hotter rock  from the lower mantle. This is called as convection in earth’s mantle .

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.