What is the message expressed in these final two lines?

Responses
A There are lots of creatures at the beach.There are lots of creatures at the beach.
B The beach is a good place to play hide and seek.The beach is a good place to play hide and seek.
C You can see a reflection of yourself in the sea.You can see a reflection of yourself in the sea.
D Being at the sea makes us realize who we really are.

D Being at the sea makes us realize who we really are.