Final answer:
Simulation is the learning strategy that offers a realistic yet risk-free environment for learners to practice and develop problem-solving skills by mimicking real-life scenarios.
Step-by-step explanation:
The problem-solving learning strategy that provides the learner with the most realistic, risk-free learning environment is B) Simulation. Simulations create an interactive and immersive environment where learners can engage in real-world scenarios without the associated risks. They can make decisions and see the consequences of their actions in a controlled setting, which aids in understanding complex systems and developing problem-solving skills. Simulations are particularly useful because they can realistically mimic the dynamics of real-life situations, allowing learners to practice skills and apply knowledge in a safe and forgiving environment. This makes it an ideal tool for many fields, including medicine, engineering, and pilot training, where the cost of mistakes in the real world would be extremely high.