Question

A mi hermano ___________ ______________ (encantar) viajar.

Answer 1

First blank should be le because le and les are the only ones that have to be clarified. And since you are talking about one person, the second blank should be encanta (to love or to be enchanting).

Remember the I.O

me           nos

te              os

le              les

Your sentence should be:

A mi hermano le encanta viajar.

Answer 2

A mi hermano le encanta viajar

Saludos :)