Why are cells considered the most basic unit of life

Cells are considered the basic units of life in part because they come in discrete and easily recognizable packages.

Explanation:

That's because all cells are surrounded by a structure called the cell membrane — which, much like the walls of a house, serves as a clear boundary between the cell's internal and external environments.

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 "Cells are considered the basic units of life in part because they come in discrete and easily recognizable packages. That's because all cells are surrounded by a structure called the cell membrane — which, much like the walls of a house, serves as a clear boundary between the cell's internal and external environments.''

Explanation:

then that particular organisms become extinct.

cell regulation is conducted by special proteins.