Identify a situation in which you would want to have a high resistance and a situation in which youwould want to have a low resistance

When you're being held hostage, you're going to want to have low resistance. Sure, it's not going to guarantee you'll live, however, it'll surely buy you time for support, think for a plan, and sadly delay your demise. High Resistance during workouts for better muscle. In contrast though, do you mean electrical resistance? That would be a different answer.

Because a model would make the investigation easier to understand

Idont really know sorry