Under Contact Us menu , we can see the following submenus.
1.  Contact Us
2.  Inquiry Form
3.  Career

Contact Us
The content of this page can be updated from Pages -> Contact Us in admin backend.

Inquiry Form
The content can be updated from Pages -> Inquiry Form in admin backend. The contact form can be configured from Contact -> Contact-us section on backend.

Career
The content of this page can be updated from Pages ->Career in admin backend.