Answer:
Deprotonation followed by a substitution reaction leads to the formation of given compound.
Explanation:
In the first step, acetylene reacts with sodium hydride to produce a strong nucleophile acetylide anion.
In the second step, acetylide anion gives a substitution nucleophilic bimolecular reaction with 1-bromohexane to produce the given structure.
So a combination of deprotonation and substitution reaction yield the given compound.
Synthesis steps are shown below.