Which programming language type requires a complete definition of components before compilation?

The correct choice highlights that the type of programming language requiring a complete definition of all components before the code can be compiled is linked to the use of a compiler. In compiled languages, the entire source code must be fully defined and syntactically correct before the compilation process can transform it into machine code or an executable format. This ensures that all variables, functions, and data types are appropriately defined and compiled in one go.

This process contrasts with those using interpreters and scripting languages, which may execute code line by line, allowing for more flexibility in coding. Additionally, structured programming is a methodology that can be applied to any programming language rather than a type associated with how components must be defined prior to execution. Thus, the need for complete definitions in compiled languages underscores their nature and operation, solidifying why the choice related to compilers is the valid selection in this context.