#### Answer

A plausible reaction is a redox reaction, including the oxidation of $\mathrm{Mg}(\mathrm{s})$ to $\mathrm{MgO}(\mathrm{s})$ and reduction of $\mathrm{CO}_{2}(\mathrm{g})$ to $\mathrm{C}(\mathrm{s}),$ as follows: $2 \mathrm{Mg}(\mathrm{s})+\mathrm{CO}_{2}(\mathrm{g}) \longrightarrow2 \mathrm{MgO}(\mathrm{s})+\mathrm{C}(\mathrm{s})$

#### Work Step by Step

See answer.