Final answer:
Planning, control, financial, technical, source code, and comments within source code are all 4) components related to software development and project management. These terms are not related to variables, functions, or keywords, which have specific technical meanings in programming.
Step-by-step explanation:
Planning, control, financial, technical, source code, and comments within source code are all components that play a crucial role in software development and project management. These components are not variables, functions, or keywords - terms that have specific meanings in the context of programming and computer science. Planning involves setting project goals and outlining the steps to achieve them. Control is about monitoring progress and making necessary adjustments. The financial component pertains to budgeting and managing costs. Technical aspects refer to the actual software development and technology used. Source code is the set of instructions written in a programming language that make up a software program, and comments within source code are annotations that help explain the code to human readers but are ignored by compilers and interpreters.