The correct answer is "Because the problem may not be clear."
Defining a problem is the first step of problem solving because it helps to clarify the issue at hand. Often, the problem may not be immediately obvious or may be complex with multiple facets. Taking the time to clearly define the problem enables individuals or teams to understand its scope, implications, and the best strategies to address it effectively. This step is critical to ensure that the solutions developed later are relevant and targeting the right issue.