Final answer:
The statement is True. Selection provides only a limited number of predefined options; thus, it may not capture all possible valid inputs in some scenarios, necessitating the need for more comprehensive input validation methods.
Step-by-step explanation:
The statement that 'selection by itself is insufficient for input validation because it provides only a finite number of opportunities for the user to input valid data' is True. Input validation is a crucial process in securing and processing user inputs to ensure that the data entered is sensible, reasonable, and secure. Solely using selection (e.g., dropdown lists, radio buttons) may not cover all possible valid inputs, especially if the input domain is too large or not well-defined. External validation through additional checks or filters is often necessary to account for the wide range of input a user might provide.
For example, if a user needs to input a date, a selection mechanism alone wouldn't account for all possible valid dates. Instead, a more robust input validation system would also include logic to ensure the input adheres to a correct format (such as MM/DD/YYYY), is within a reasonable range, and perhaps even checks against an external calendar API for actual valid dates.