A very good quiz, except for the answer to the last question. A tree that keeps it's needles or leaves alll year around is called an Evergreen. Conifers like pines and firs do keep their needles all year around, but so do oaks, holly, magnolias, palms, etc. keep their leaves all year.
Do what you can, with what you have, where you are.
26th president of US (1858 - 1919)