Which type of model includes graphs and charts?

Schematic models are designed to represent systems or processes in a visual format, utilizing graphs and charts to convey complex information clearly and effectively. They focus on how various components within a system relate to one another, often simplifying the representation to enhance understanding. This visual format helps stakeholders to quickly grasp relationships and flows, making it easier to analyze and communicate about the system.

In contrast, physical models are tangible representations of objects, which might not necessarily include visual aids like graphs or charts. Mathematical models use equations and calculations to represent relationships and can be quite abstract, lacking visual components. Dynamic models emphasize how systems evolve over time, often including simulations but not necessarily relying on the graphical representation synonymous with schematic models. Therefore, schematic models are specifically geared towards utilizing graphs and charts for illustration, making them the correct choice.