Answer:
Conditional Formatting
Step-by-step explanation:
A database management system (DBMS) can be defined as a collection of software applications that typically enables computer users to create, store, modify, retrieve and manage data or informations in a database. Generally, it allows computer users to efficiently retrieve and manage their data with an appropriate level of security.
A data dictionary can be defined as a centralized collection of information on a specific data such as attributes, names, fields and definitions that are being used in a computer database system.
In a data dictionary, data elements are combined into records, which are meaningful combinations of data elements that are included in data flows or retained in data stores.
This ultimately implies that, a data dictionary found in a computer database system typically contains the records about all the data elements (objects) such as data relationships with other elements, ownership, type, size, primary keys etc. These records are stored and communicated to other data when required or needed.
Conditional formatting is a feature found in a lot of spreadsheet software applications such as Microsoft Excel and it avails end users the ability to apply specific formatting options to cells based on certain defined criteria.
Basically, it is used for highlighting, emphasize, comparing or differentiating between data (information) stored in a spreadsheet document i.e data values that are lesser than or greater than a specificied value.
In this scenario, Theo would like to apply formatting to record data based on values in comparison with values in other fields. Thus, the option he should use is conditional formatting.