Correct Answer : Rails
Explanation : Rails is an open-source server-side web application framework. It is written in Ruby and is a model-view-controller (MVC) framework, providing default structures for a database, a web service, and web pages.
Correct Answer : @each
Explanation : In @each directive, a variable is defined that contains the value of each item in a list.
@each
Correct Answer : All of the Above
Correct Answer : It is specified as a collection of nested rules that can make style blocks at the root of the document.
Explanation : The @at-root directive in SASS is specified as a collection of nested rules that can make style blocks at the root of the document.