What is a function in Python?

A function in Python is indeed defined as a reusable block of code designed to perform a specific task. Functions allow you to group together a sequence of statements that perform a particular operation, making the code more organized and easier to manage. When you define a function, you specify a name and a set of parameters. This enables you to call the function from various places in your code with different arguments, thus promoting code reusability and efficiency.

Functions also help in breaking down complex problems into smaller, manageable parts, which is a key practice in programming. This modular approach enhances readability and maintainability of the code, as it allows you to test each block independently.

By contrast, the other options do not accurately describe the concept of a function in Python. While data storage is related to variables and data structures, and error handling is associated with try-except blocks, neither directly defines what a function is. Similarly, while data structures like lists or dictionaries organize information, they are not the same as a function, which executes a specific action rather than organizing data.