8107. UNITE

✅ The correct answer is option C.
Unfold : open or spread out from a folded position.

Unchain : remove the chains fastening or securing (someone or something).

Combine : join or merge to form a single unit or substance.

Unhinge : make (someone) mentally unbalanced.

Unite : come or bring together for a common purpose or action.

Synonym of Unite is Combine