The process(es) requiring the absorption of energy is I are:

Energy is used in the process of changing an atom into an ion with a negative two-charge potential. Additionally, adding electrons to noble gases requires energy.

$\therefore \mathrm{S}\to {\mathrm{S}}^{-2}$ and $\mathrm{Ar}\to {\mathrm{Ar}}^{-}$are process requiring absorption of energy.