Please put the context so that I can help you
1. Como esta usted.
2. Como estas
3.buenas tardes senora, como esta (Usted)
4. Que tal
5. Como has estado
There are many ways to say this, formally use Usted for "You"
Cuban houses are large and made sometimes of stone or wood.
Number 1 is the right sentence
The correct answer is letter A, proteger el medio ambiente.