Final answer:
The term that describes the units that the 'Ganga' can measure is D) resolution, which demonstrates the precision of a measurement tool by the size of its smallest increments.
Step-by-step explanation:
The term that refers to the units which the Ganga (an instrument or tool for measurement, assuming a hypothetical object named 'Ganga') is capable of measuring is resolution. Resolution is related to the precision of a measuring tool and is defined by the size of its measurement increments. The smaller the measurement increment, the higher the resolution and the more precise the tool.
However, it is important to distinguish between the concepts of accuracy and precision, which are often used interchangeably in everyday speech but have distinct meanings in scientific contexts. Accuracy refers to how close a measurement is to a standard or known value, while precision indicates the consistency of repeated measurements. High-resolution devices lead to a high degree of precision as they can measure smaller differences.