What is the primary purpose of a function in Python?

The primary purpose of a function in Python is to encapsulate a block of code that performs a specific task when invoked. Functions allow developers to organize code into reusable segments, making programs easier to understand and maintain. By defining a function, you can execute the same code multiple times within a program without rewriting it, which also promotes code reusability and reduces redundancy.

When a function is called, it can take inputs (known as parameters) and may return an output, providing a structured way to process data. This encapsulation of tasks makes it easier to manage larger programs and enables teamwork, as different developers can work on different functions independently.

Other options presented do not accurately describe the primary purpose of a function. Creating variable names dynamically, defining global constants, or visualizing data are not the main objectives of functions in Python; rather, these concepts may utilize functions as tools but do not capture their fundamental role. Functions are primarily about performing specific tasks in an organized manner.