Which statement is used to execute code only if a specific condition is met?

The statement that is used to execute code only if a specific condition is met is a conditional statement. Conditional statements allow for decision-making in a program by evaluating a condition, and depending on whether that condition is true or false, specific blocks of code are executed.

In Python, this is commonly implemented using the if statement, which can also be combined with elif (else if) and else to handle multiple conditions. This structure enables programmers to control the flow of execution based on varying situational requirements.

The other options do not fulfill this purpose: loop statements are designed for repeated execution of code blocks, expression statements are used to evaluate expressions but do not control code flow based on conditions, and function definitions create reusable code blocks without directly relating to condition-based execution.