Answer:
A rack is a metal frame used to hold various hardware devices such as servers, hard disk drives, modems and other electronic equipment.
A tower is a metal chassis that holds all of the computer's components.
I hope this helped you !
(B. Hardware), Hardware is physical components, Software are the programs in the computer.
Answer: Fourth- generation language
Explanation:Structured Query Language (SQL) is the language that is in the form of database structure which helps in the manipulation of the data and management as well.
SQL is considered as the fourth generation language because it is used for the accessing of the data from the database.It is also known for the advancement in the third generation language and thus also improving the language interface with users.
