Final answer:
The best option for a developer to program a component that allows a user to enter a series of values is a loop, as it facilitates the repetition needed to collect multiple inputs.
Step-by-step explanation:
To allow the user to enter a series of values, the best choice would be a loop. While a function encapsulates a piece of code that can be reused, and an array stores a series of values, a loop allows the code to accept multiple inputs, typically by iterating until a certain condition is met. An if statement is primarily used for making decisions based on conditions but does not inherently allow for the repetition needed to enter a series of values.