I believe the answer is: <span> have external ears
The seals on the other hand, only have small gap in the side of their heat but </span>lack an external ear<span> flap.
The function of the external ears are very similar to humans' , But sea lion's ears have different structures that help them to sustain pressure to protect them when they're diving.</span>
Advantages are<span> protecting us from tyranny, dispersing power, increasing citizen participation, and increasing effectiveness. The </span>disadvantages are<span> supposedly protecting slavery and segregation, increasing inequalities between states.</span>
