Final answer:
The 'problem and solution' text structure is neutral and is used to describe a problem and its solution(s). Its connotation depends on how the issue and response are presented and connected within the text. Effectiveness is judged by clarity, development, and the integration of evidence.
Step-by-step explanation:
The text structure "problem and solution" does not inherently carry a positive or negative connotation. Rather, its function is to present a predicament or challenging issue (the problem) and the solution(s) proposed or implemented to address that issue. This structure can be developed by either identifying the problem first and subsequently discussing the solution, or by presenting the solution and then explaining the problem that necessitated it.
The effectiveness of this structure in a passage depends on how well the author develops and connects the problem to the solution. Good problem-and-solution paragraphs should have a clear central point, be adequately developed, and integrate evidence smoothly to support the recommendation. This structure aids readers in understanding the complexity of issues and the possible interventions that can improve or resolve the situation.