Which logical operator forms a Boolean expression that is True when any joined expression is True?

The logical operator "Or" is used to combine two or more Boolean expressions, and it evaluates to True if at least one of the joined expressions is True. This characteristic makes it an inclusive operator, allowing for greater flexibility in decision-making scenarios.

For instance, if you have two conditions, A and B, the expression A Or B will yield True if either A is True, B is True, or both A and B are True at the same time. This is particularly useful in programming and logical reasoning, where it's common to want to validate multiple conditions and proceed if any one of them meets the criteria.

In contrast, the other operators listed serve different purposes. "And" requires all conditions to be True for the overall expression to be True, while "Not" inverts the truth value of a single condition. The "Xor" (exclusive or) requires exactly one of the conditions to be True for a True result, which is more restrictive than the inclusive nature of "Or." Thus, "Or" stands out as the correct choice for forming a Boolean expression that is True when any joined expression is True.