february is the month with the shortest amount of days however june has the shortest days in terms of daylight hours in the southern hemisphere and december has the shortest days in the northern hemisphere. Circle should be accepted for sphere and olympus mons is the largest volcano, not mt olympus which is in washington not mars like olympus mons.
also if you write "What is the largest volcano in the world?" and then say it's not on earth it kinda doesn't make sense.
its taken that the answer IS on earth and its also NOT mt Olympus