All of them mean you
Tú - you second person
Usted is a singular form
<span>Ustedes is a pural
you answer would be ustedes!!
</span>
Venga a nuestra casa is used for someone who should respect or who is elderly so this would be the right choice.
Ven a nuestra casa would be used to refer to maybe your close friends or people you can be casual with :)
D. Bicicleta
it means bicycle which will save you money on gas
Ella sabe jugar muy bien.
1. Ella esta en el parque central
2. Ella va a la biblioteca
