Answer:
to inspire students and make an impact
Explanation:
B)
The correct answer is - A) extrusive.
The extrusive igneous rocks, and the type of igneous rocks that are forming on the surface or very close to the surface. This type of igneous rocks are forming very quickly because the magma is cooling down very quickly, thus giving them some specific characteristics.
These types of rocks can be easily distinguished from the intrusive rocks, the extrusive ones, because of the quick formation, have very small crystals, almost unnoticeable, while the intrusive ones, because they have much bigger period of formation, have nicely formed, easily noticeable, big crystals.
Convection occurs in fluids (so both liquids and gases, as well as rheids) and is the concerted, collective movement of groups or aggregates of molecules within the above through advection or diffusion or both at the same time. Convection can never take place in solids and is only specific to fluids.
