Answer:
Database engine.
Step-by-step explanation:
The database engine is one of the components of the database management system and its main function is to allow for storage of data, manipulation of data and retrieval of data. it is also responsible for the processing and security of data. It is sometimes called the heart of the database management system.
Other components of the database management system, among others, are;
i. Query processors for transforming queries into low level instructions.
ii. Data manager for handling data error and recovery
iii. Data which is the main component of the database management system on which operations are done. If there were no data there would be no database management system.