HELP PLS Using the picture below, which wave would have a higher pitch.

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

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)