A bay.
They are called pebbles...
yes
A sea a portion of ocean that is enclosed or partly enclosed by land
A narrow strip of land connecting to land areas is called at isthmus. A delta looks like a very small peninsula.
Small single celled plants called 'phytoplankton', seaweeds and sea grasses.
There are many types of animals and plants in the ocean. The tiny sea plants and animals are called plankton or phytoplankton.
ocean
The "arms" of an ocean have names such as seas, bays, gulfs, bights, and fjords.
A small rounded stone typically found in rivers is called a pebble. Pebbles are formed through the natural erosion of larger rocks, resulting in their smooth and rounded shape. They are often used in landscaping and for decorative purposes, as well as in various construction applications.
ductus arteriosum
A small country road is typically called a "lane" or a "byway." These roads are often narrow and winding, providing access to rural areas or connecting smaller communities.
Phytoplankton