Answer:
A sphere has three, a circle has two, and a point has zero. What is it?
What type of house weighs the least?
You can carry it everywhere you go, and it does not get heavy. What is it?
What is something you can give away as many times you want without ever losing it?
A standard dimension for sandwiches and rulers
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?