Which of the following statements is true?

the milky way galaxy does not move.
all galaxies are spiral in shape.
the hubble telescope has been used to study faraway stars and galaxies.
all of the above

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.