Correct Answer: Hetrocercal

Solution : The correct option is Hetrocercal.

Sharks have a heterocercal tail structure. Heterocercal tails have an asymmetrical form, with the top lobe of the tail being bigger and extending further than the lower lobe. This shape gives sharks lift and stability in the water, which helps with buoyancy and effective swimming. The enlarged top lobe aids sharks in maintaining their place in the water column and is ideal for their predatory and active swimming lifestyle.