.. and you could have 3 things with you of your choosing, what would you pick? Providing that you don't know what's on the island, there's nothing but sea water as far as you can see in any direction and there is no signal for anything electronic that requires.
Most Helpful Guy
A generator that produces perpetual energy.
A self-managing greenhouse farming system complete with test-tube grown chicken pieces.
A 5 story fully furnished house complete with space needle.5