Sharks have as skeleton that contains\nOptions:\n- (A) elastin\n- (B) Epidermis\n- (C) calcium\n- (D) fur and fat\n- (E) marrow\n- (F) strength\n- (G) all matter\n- (H) collagen
Stream of thoughts:
(H)
Cartilage is a tough tissue that contains a protein called collagen.

Sharks have a cartilage skeleton.

Sharks have as skeleton that contains a protein called collagen.

.

So, the final answer is (H)