What defines a gulf?

A gulf is defined as a deep inlet of the sea, often characterized by its significant extent into the land and deeper waters compared to surrounding areas. This geographical feature is typically larger than a bay and can be found along coastlines where the land contours create a recess in the coastline, allowing for deeper waters to penetrate inland.

This definition aligns with the characteristics and formation of gulfs, which often serve as important sites for shipping, coastal ecosystems, and sometimes tourism. Their unique contours can support diverse marine life and create sheltered conditions for ports and harbors. Other options, such as a shallow body of water or an area of low land, do not accurately capture the essence of a gulf, as gulfs are defined by their depth and connection to larger bodies of water like oceans or seas. Similarly, a broad river mouth pertains to river systems rather than maritime recessions like gulfs. Thus, identifying a gulf as a deep inlet underscores its geographical importance and distinctive features.