What brings new rock to earth's surface?

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

What were two likely reasons that clan chiefs opposed buddhism when it was introduced in japan?

This cartoon appeared in 1916. the topic of the cartoon isa)the reason for the start of world war i.b)the success of us submarines in world war i.c)the military alliance between germany and mexico.d)the attitude in the us towards submarine warfare in world