I would say para. Because para means "to" and the sentence is saying "my brother bought a bike to ride in the mountains"
For the smiley face one put these numbers
1,6,10,12,2,9
For the sad smiley face put these numbers
3,4,5,7,8,11
You: Hola! Me llamo(a) ____ (name). Soy de ____ (place you’re from). Me gusta ___ (an activity you like) en miercoles. No me gusta ____ (an activity you don’t like). ¿de donde eres?
i tried helping out a little bit. i would do the paper yourself but here’s a little help.