Which kitchen tool would best be used for measuring dry ingredients?

The most suitable tool for measuring dry ingredients is a measuring cup. This tool is specifically designed for accurately measuring the volume of solid ingredients such as flour, sugar, and grains. Measuring cups often come in various sizes and are marked to indicate measurements, allowing for precise portioning when baking or cooking, where accuracy is crucial.

A ladle is primarily designed for serving liquids and would not provide the precision needed for dry ingredient measurements. A thermometer is used to measure temperature, which is not relevant for measuring volume or weight of ingredients. A whisk is used for combining ingredients or incorporating air into mixtures but does not have measuring capabilities. Thus, the measuring cup stands out as the ideal tool for this particular task.