The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the
in-situ
) temperature, then melting will occur and in this case magma will form.
A "limited government" is a government that has restricted or limited power to intervene in matters of exercise of civil liberties and is stopped by law or written constitution. It is actually a principle of free market <span>libertarianism</span>. I hope the answer comes to your help.
A) true. rural to urban migration is happening on a massive scale due to population pressure
True. Everyone's vote in the election process counts!
