The question asks how we can solve food insecurity while reducing food waste, and all provided responses are valid strategies. However, if you had to select one response that directly addresses both food insecurity and food waste reduction, the best option would likely be:
donate unused food to food banks
This option not only helps to solve food insecurity by providing food to those in need but also reduces food waste by ensuring that unused food is not discarded.
The other options—inventorying food supplies, purchasing only as much as needed, and not throwing scraps in the landfill—help reduce food waste but do not directly address food insecurity as effectively as donating food.