Respuesta :
Explanation:
I do believe its "Although horseback riding is fun, but it can be expensive"
you can tell because it adds the But into it. someone can probably give you a better explanation but thats what i got
1. Although horseback riding is fun, it can be expensive
4. Horseback riding is fun; however, it can be expensive.
5. Horseback riding is fun, but it can be expensive.