The answer would have to be D. Noise
(:
That layer of skin is called the cuticle.
The tricuspid valve is situated between the right atrium and right ventricle.
The pulmonary valve is between the right ventricle and the pulmonary artery. The mitral valve is between the left atrium and left ventricle.
I believe it is A; AR, ME, and KY
D. Removing bones and pits from food
Hope this helps! Good luck. :)