Dennis Ritchie created the C programming language for building system applications that communicate directly with hardware components like kernels and drivers.
C programming is referred to as the mother language since it forms the foundation for all other programming languages.
In that it permits direct memory access and numerous “low-level” computer operations, C is one of the most powerful “modern” programming languages.
Compilation of the C source code results in standalone executable programs.

C programming is considered as the base for other programming languages, that is why it is known as mother language.