Tengo = I have to. this is it's translation
4. Esquiar
That means skiing. If you would chosen 1, it would mean singing, and you can sing anytime and not only winter. 2, it means riding a bike, and you definitely can't do that in winter. And 3, that would mean swimming, and I'm pretty sure nobody would want to swim when it's freezing cold outside.
La Moneda official de los estados unidos es el dólar
Usted because its a polite way when speaking to some one