select the correct answer.\nin order for them to work, what must the control rods in a nuclear reactor…

select the correct answer.\nin order for them to work, what must the control rods in a nuclear reactor contain?\na. neutron - emitting material\nb. neutron - absorbing material\nc. uranium - 235\nd. water
Answer
Brief Explanations:
Control rods in a nuclear reactor are used to control the rate of the nuclear chain - reaction. They do this by absorbing neutrons. Neutrons are what cause the fission of uranium - 235 in the reactor core. By absorbing neutrons, control rods can slow down or stop the chain - reaction.
Answer:
B. neutron - absorbing material