A1. Hypertext Makeup Language
A2. establish a website's readability and visual hierarchy.
A3. provide additional info about elements in HTML
Q4. Cascading Style Sheets
A5. where this tag has a "/, whereas an opening tag does not
A6. <"img">
Q7.<"body"><"body"><"html" <"head">
A8. a "skinny doctype" because of its barebones code.