A model in GIS and geospatial science is a mathematical or computational representation that describes how real-world geographical elements relate to each other.
Models help simulate natural processes, analyze spatial patterns, and predict future scenarios.
For example, hydrological models simulate water flow and drainage patterns in a watershed, while urban growth models predict city expansion.
Such models use input data like elevation, land use, and climate variables, and apply mathematical equations to represent physical processes.
The output helps planners, researchers, and decision-makers understand complex relationships and test different scenarios.
Therefore, the blank should be filled with Model as it perfectly matches the definition given.