Mitochondria are the the powerhouse of the cell the convert enrgy all throughout it..
B. Excretory system. Think of it helping things to EXIT your body
The correct answer is C. lens. Lens is a convex sealed capsule containing a clear fluid and focuses light to the back of the eye. Iris is the colored part of the eye that contracts and expands under influence of ciliary muscle. Retina is the inner surface of back of eye. Cornea is a transparent and curved surface of eye that helps to focus light.
