-e
The -ing form can either a noun or an adjectival role, functioning as a non-finite verb or simple noun or adjective. As a non-finite verb in the noun case, it is called a gerund while it's termed present participle in the adjectival or adverbial case. In short, gerunds engender noun phrases while participles are associated to adjectival/adverbial phrases.
The -ing ending can also modify a noun when derived from a verb form. e.g.: rise -> rising as in rising tensions. The logical implication vis-a-vis the proposed answer choice is that the weekend was marked by its relaxing features, allowing the persona to derive benefits from it.