What is the translation of 'individual' in Spanish?

The translation of 'individual' in Spanish is indeed 'individual.' This term is borrowed directly from English and retains the same meaning in both languages. It refers to something that is separate, distinct, or pertaining to a single person, which aligns perfectly with how 'individual' is commonly used in English.

The other options present translations that have entirely different meanings. For instance, 'grupo' translates to 'group,' which relates to multiple individuals rather than a singular one. 'Billete' translates to 'ticket' or 'bill,' commonly associated with transportation or currency, while 'excursión' means 'excursion,' referring to a journey or trip, typically involving a group of people. Therefore, 'individual' is the correct choice as it maintains its meaning consistently across both languages.