(N/A) Alkenes contain a carbon-carbon double bond consisting of one strong $\sigma$-bond and one weak $\pi$-bond.
The $\pi$-electrons are loosely held and are available as a source of electron density,making the alkene molecule electron-rich.
Electrophiles $(E^+)$ are electron-deficient species that are attracted to this electron-rich $\pi$-electron cloud.
Upon attack by an electrophile,the weak $\pi$-bond breaks easily,leading to the formation of a more stable saturated compound through an addition reaction.
Therefore,alkenes are more reactive towards electrophilic addition reactions compared to alkanes,which only contain strong $\sigma$-bonds.