The IDEAL model, which stands for Identify the problem, Define the goals, Explore possible strategies, Act on the strategies, and Look at the effects, indeed suggests exploring possible solutions through brainstorming strategies.
Among the options you provided, the most fitting strategy that aligns with the IDEAL model for exploring possible solutions is:
Brainstorm with questions or graphics.
This approach encourages creative thinking and can help generate a variety of potential solutions to address the problem at hand.