Answer:
Why are there no living cats on Mars?
When it comes to me you go on red and stop on green.
Mr. Red lives in the red house. Mr. Blue lives in the blue house. Mrs. Pink lives in the pink house. Who lives in the white house?
I work when I play and play when I work
I am a word of letters three. Add two and fewer there will be. What word am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.