Answer 1

A web development framework is a set of resources and tools for software developers to build and manage web applications, web services and websites.

The framework also provides the foundations and system-level services for software developers to build a content management system (CMS) for managing digital information on the Web. Developers can use the framework to define the 'out-of-the-box' content management capabilities, user authentication features, and administrative tools.
For me when it comes to The front end of an application I choose Twitter bootstrap