1. Hypertext Markup Language

2. 6

3. .htm / .html

4. <a>

5. background-color

6. line-height

7. br

8. src

9. Cascading style sheets

10. Style

11. Link tag

12. 5

13. font-size: ;

14. Border-color

15. option

16. The Document Object Model is a cross-platform and language-independent interface that treats an HTML or XML document as a tree structure wherein each node is an object representing a part of the document or : Convention for representing and interacting with objects in html documents

17. date

18. embed

19. footer

20. div / aside

21. div

22. track

lt.29: https://hashnode.com/post/clqy49vz4000309jq1rscaozj