Final answer:
A reactive strategy is an unplanned approach taken in response to unexpected situations, similar to trial and error problem-solving.
Step-by-step explanation:
A reactive strategy is an unplanned strategy that arises in response to unexpected opportunities and challenges. Unlike predetermined strategies, a reactive strategy is not planned in advance but rather is formulated on the spot when an unforeseen situation presents itself.
For example, when dealing with a broken printer, after checking the ink levels and ensuring there isn't a paper jam or a connectivity issue, you might discover an unexpected hardware error and decide to consult a technician. This spur-of-the-moment decision exemplifies a reactive approach to problem-solving.
Reactive strategies are similar to the well-known trial and error approach, as they involve trying different solutions until the problem is resolved, though they may not always be the most time-efficient way of dealing with issues.