Final answer:
The arrangement of fields in a list is dictated by the database schema or the software application configuration, where users can customize the presentation as per their requirements.
Step-by-step explanation:
The fields that appear in a list and their order are typically defined by the schema or structure of a database or the design of a software application. When dealing with databases, a schema dictates the columns that exist within a table, and a query is used to determine which fields are displayed and in what order. In the context of software applications, the configuration of the user interface or a report design often specifies which fields are shown and their sequence. Additionally, customization features may allow users to modify this presentation based on their preferences or needs.