Answer:
28 meters
Explanation:
We measure altitude with respect to the sea level. The height of mount Everest 8,848 with sea level. Height at sea level is 0 m , it is assumed to be the reference. In this question because the sea bird is 28 meters above the surface of the ocean its elevation will be same as 28 m. Hence we can say that the elevation of the sea bird will be 28 meters.