George brushes his teeth twice every day. lately, he has noticed discomfort when brushing in some areas of his mouth. which topics should he bring up to his dentist?

George should bring up his brushing habits and his bleeding gums and pain with his dentist because he may be may be brushing too hard or too much in one spot. That may lead to pain and bleeding gums.

the plates spread at mid-ocean ridges (they are divergent plate boundaries) which allows magma to rise through the weakness between the plates. the magma then emerges as lava from the boundary and cools, creating a new crust.