Question

fussion and fission are both processes that involve which fundamental force

Answer 1

A--GRAVITATIONAL
B--WEAK NUCLEAR
C--ELECRTOMAGNETIC
D--STRONG NUCLEAR

Answer 2

Fusion and fission are both nuclear reactions. So, you can safely rule out choices A and C. Have you ever heard of nuclear energy or nuclear bombs? They are famous for being able to tap into the strong nuclear force (which is responsible for keeping positively charged protons together, against their usual repelling nature).