Anuclear fission reaction and a nuclear fusion reaction are similar because both reactions
(1) form heavy nuclides from light nuclides
(2) form light nuclides from heavy nuclides
(3) release a large amount of energy
(4) absorb a large amount of energy

Both reactions release a large amount of energy is the statement that is correct about the similarity between a nuclear fission reaction and a nuclear fusion reaction.

A nuclear reaction is a procedure that leads to combining and modifying the nuclei of atoms, absorbing or releasing particles and energy according to each case.

When nuclei fragment, the reaction is known as nuclear fission, which releases energy.The reaction that occurs when two light atomic nuclei join together is known as nuclear fusion, generating a heavier nucleus and releasing a large amount of energy.

Therefore, we can conclude that while in a fusion reaction two or more light nuclei unite, in a fission reaction a heavy nucleus breaks, both cause the release of energy.

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(3) release a large amount of energy

Explanation:

Nuclear fusion is a process which involves the conversion of two small nuclei to form a heavy nuclei along with release of energy.

Nuclear fission is a process which involves the conversion of a heavier nuclei into two or more small and stable nuclei along with the release of energy.

Thus in the both the reactions energy is released.

Explanation:

If you are not increasing the amount of vinegar, the adding more baking soda has nothing to react with. The limiting reagent is vinegar (or some other acid).

The usual reaction is

HC2H3O2 + NaHCO3 ===>  NaC2H3O2 + HOH + CO2 which is the gas being expelled.

If you increase the NaHCO3 nothing more will happen until you increase the vinegar.