A(n) is a file that stores a collection of related data.

A database stores a collection of related data.

It is organized in a way that you can easily access, manage and update. They process workloads to create and update themselves. They are normally organized by fields, records and files. Examples of databases include sales transactions, inventories and product catalogs.  

Css3 is the latest evolution of the cascading style sheets language and aims at extending css2.1. it brings a lot of new features and additions, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts.credits to medium for making this answer credits to google for copying this answercredits to me for putting this answer on your question