Assume main contains lots of text and the viewport width is 30em.  What will this CSS do? main{   column-width: 10em;}

In WordPress, the two main types of content are 

The term “responsive web design”  itself was coined, and largely developed, by this person.

The box model consists of a content area surrounded by:

How many times can you apply an class named hobby in an html page named index.html

The article tag is wrapped around

Flexible layouts is the practice of building the layout of a website with a flexible grid, capable of dynamically resizing to any width. Flexible grids are built using relative length units, most commonly:

When creating a responsive design using media queries, it is best to start the stylesheet by creating the styling for a _____________ device.

Flexible layouts do not advocate the use of fixed measurement units, such as pixels or inches, because the viewport height and width continually change from device to device.

What is the correct way to specify the document type in  an HTML5 document.