A cross section is a two-dimensional view of a three-dimensional object or structure. In research, cross sections are often used to visually represent data, relationships, or trends within a specific field of study. For example, in the field of material science, cross sections may be used to analyze the internal structure of materials, such as metals or composites. In geology, cross sections can be used to illustrate the different layers of rock or sediment in a specific area. In biology, cross sections are commonly used to study the internal structures of plants, animals, or cells. Overall, cross sections are a valuable tool for researchers to better understand and communicate complex information in a more accessible way.