Please answer my questions​

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)