I don't understand what you mean by "the following" or "which of", and there are no suggestions listed to pick from.
If any of the THESE things is on this list in the place where you copied the question from, then it's the answer. If <em>none</em> of these is on the list, then you're on your own.
-- A bowling ball on the floor in the upstairs closet.
-- A car up on the rack having an oil-change.
-- A helicopter hovering 10-ft off the ground.
-- A mosquito hovering 10-ft off the ground.
-- A helium party balloon hovering 10-ft off the ground, with its string tied to a chair.
-- A regular party balloon full of regular air, with its string tied to a chair, and dangling down the back of the chair.
-- A regular party balloon full of regular air, tied to a hook in the ceiling, dangling down but not reaching the floor.
-- A gallon of gasoline, in the tank of your car, that has not burned yet.
-- A kitchen match, in the box, that has not burned yet.
-- A birthday candle, standing up in the middle of a rose on the cake, that has not been lit yet.
-- A stick of dynamite that has not been lit yet, lying on the ground.
-- A firecracker that has not been lit yet, lying on the ground.
-- A squirrel sitting up in the tree watching me walk by on the ground.
-- A bird sitting up in the top of the tree watching the squirrel.
-- A chewed up piece of roast beef that has not been digested yet, lying in your stomach.
-- A chewed up piece of roast beef that has not been digested yet, lying in MY stomach. (A more satisfying example)
-- A tree branch that broke off in the wind yesterday and is lying on the roof of your house.
-- The air that is right under the ceiling in your bedroom.
-- YOU, when you are fast asleep in the top bunk in your bedroom.
-- A rifle bullet that was fired straight up, reached the peak of its trajectory, and is just about to start falling downward in 0.001 second from now.
-- The rocket that was launched, went straight up for a while, ran out of fuel, continued to coast straight up for a while, reached the peak of its trajectory, and is just about to start falling downward in 0.001 second from now.
