Answer:
a. data manipulation
Explanation:
Data manipulation is to used to add, delete, modify, and retrieve records from a database. One of the most popular data manipulation language is that of Structured Query Language (SQL), which is used to retrieve and manipulate data in a relational database.
The main purpose of data manipulation, is to make data easier to read and more organized. For example, a log of data could be organized in alphabetical order, or according to time, e.t.c. This will allow those that are interested in the data to fully understand, see trends and draw up conclusions easily.
