Which one of the following best describes the process in which the crust plunges (ducks, sounds like ducts) down into the mantle.

Which one of the following best describes the process in which the crust plunges (ducks, sounds like ducts) down into the mantle.

Which one of the following best describes the process in which the crust plunges (ducks, sounds like ducts) down into the mantle.













a) Seafloor spreading
b) Subduction
c) Magma
d) Radioactive decay














Answer: B