Which describes nuclear fusion?

A: Starts when two atoms slam together to form one heavier Atom
B: Starts win a neutron slams into an atom, causing the larger atom to split into two smaller atoms
C: Starts with a neutron slams into an atom, causing two atoms to form one have your atom
D: Starts with two atoms slammed together, causing the larger atom to split into two smaller atoms

None of the given options accurately describes nuclear fusion. Nuclear fusion is a process in which two atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process.