Describe the process of nuclear fission. How does it work and when is it used? What is meant by a chain reaction, and how do you control it?

it has to be b, about 97 percent.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods