Which statement best describes aromatic hydrocarbons?

Aromatic hydrocarbons are best described as hydrocarbons that contain a benzene ring. The defining feature of aromatic compounds is the presence of a benzene ring, which is a cyclic structure characterized by alternating single and double bonds, although this bonding is often represented as a stable delocalized system of electrons. This unique structure not only gives aromatic hydrocarbons their distinctive stability compared to non-aromatic compounds but also allows them to participate in various chemical reactions typical of aromatic systems.

Benzene and its derivatives are common examples of aromatic hydrocarbons, displaying unique properties such as a distinct sweet smell and higher stability. These compounds often undergo substitution reactions rather than addition reactions, which is a key characteristic distinguishing them from many other types of hydrocarbons.

In summary, the presence of the benzene ring is crucial in defining aromatic hydrocarbons, making the provided statement accurate.