Answer:
Canvas.
Explanation:
The canvas API is used to create a place where you can display graphics on a webpage. You can also display video,games and animations there on the fly .You can do this without the need for a plug-in.
It is largely focused on 2-D graphics.This API uses canvas element of HTML.
<canvas>....</canvas>.
Wyzant Resources can either answer your question or can answer them for you.
D. DoS. DoS is a way to potentially lag or even crash different types of servers ranging from as small as a simple website to bigger websites and video games servers.
In the CSS, background-image: url( "/path/to/file" )
http://www.w3schools.com is a handy reference.