Why do two div elements “vertically stack” on one another by default?
div are block level element, default display block. automatically take up entire width of page. they will automatically stack vertical
What is the default flex-direction of an element with display: flex?
row
What are the three primary components of a page layout? (Which helper classes do you need?)
row column container
What is the minimum number of columns that you should put in a row?
1
What is the purpose of a container?