The term refers to an organization of components that define and regulate the collection, storage, management and use of data within a database environment.
a) transaction
b) database system
c) structured data
d) management system

The correct answer for the given question is option(B) i.e "database system"

Explanation:

Database is the collection of interrelated data .Database system is an organization of components that define and regulate the collection, storage and manage the data.Database system maintain the integrity in the database. Database system provides an interface to the database for information storage and retrieval.

Transaction is the contract between a buyer and a seller to interchange goods or services. it does not regulate the collection store the data so this option is wrong  .

Structured data  and management system  does not store the data that define and regulate the collection in organization. So this option is also wrong

So correct answer is database system.