Answer:
a. field data
Step-by-step explanation:
A single piece of data within a record is called a field. In a database, a record is a collection of related fields that contain information about a particular entity or object, such as a customer or product. Each field is typically labeled with a descriptive name, such as "customer name" or "product price," and contains a specific type of data, such as text, numbers, or dates. Fields can be used to filter, sort, and search for data within a database, and are essential for organizing and managing large amounts of information.