Which of the following translates to "grandchild" in Hawaiian?

The term that translates to "grandchild" in Hawaiian is indeed "mo'opuna." In Hawaiian culture, familial relationships and the language used to describe them carry significant meaning. "Mo'opuna" reflects the close ties and respect for lineage within families, as the term encompasses not only grandchildren but can also refer to descendants more broadly.

The other options represent different meanings in the Hawaiian language. "Moana" refers to the ocean or a large body of water, symbolizing expansiveness and depth. "Mele" translates to song or chant, an important aspect of Hawaiian tradition and cultural expression. "Memehune" refers to a mythical figure or beings known in Hawaiian folklore, often depicted as tiny people with great skill in construction and craftsmanship. Understanding these distinctions helps to appreciate the richness of the Hawaiian language and its cultural significance.