²₁D + ³₁T → ⁴₂He + ¹₀n + energy. The reaction illustrates

Correct Answer: Nuclear fusion

Explanation:

• The given reaction is: \[ {}^{2}_{1}\text{D} + {}^{3}_{1}\text{T} \;\;\rightarrow\;\; {}^{4}_{2}\text{He} + {}^{1}_{0}\text{n} + \text{energy} \]
• Here, deuterium (\( {}^{2}_{1}\text{D} \)) and tritium (\( {}^{3}_{1}\text{T} \)) are light nuclei.
• They combine (fuse) to form a heavier nucleus, helium-4, along with a neutron and release of energy.
• This is the hallmark of a nuclear fusion reaction.
• It is the same process that powers the sun and hydrogen bombs.

Therefore, the reaction illustrates nuclear fusion.