A reservoir can be a natural or artificial lake. This is where water is collected or stored. It can be created in river valleys through the construction of a dam.
reservoir
A natural harbor is a landform at the junction between land and a water body, where a part of a body of water is protected and deep enough to furnish anchorage. Whereas, Artificial harbors are frequently built and maintained in order to use them as ports. Artificial harbors are constructed where the depth of water is too shallow for a big ships to load and unload.
A body of water sheltered by natural or artificial barriers is called a lagoon. Lagoons are typically separated from the open sea by sandbars, coral reefs, or barrier islands, providing calm and protected waters. These sheltered environments are often home to diverse marine life and serve as important ecosystems.
Its a satellite
A Moon
The lake zone closet to the land edge is called pond. This is a body standing water. It can be natural or artificial.
fake lake
fake lake
That would be a harbor.
IJsselmeer, which is a huge artificial lake.
An artificial body part is usually called a prosthesis or prosthetic. Bionic is also used to describe artificial body parts.
An artificial satellite is a man-made object injected into orbit around another object (The Space Station is an artificial satellite of the Earth). A natural satellite is a "natural" object that orbits around another object (The Moon is a natural satellite of the Earth).