which of the following is not an ethical way of getting to the top of a web search?
having the "keyword" of a search in the title of your web page
having frequent use of the "keyword" of a search in your web page
changing your search engine's algorythm to favor your web page
having many other web sites that link to yours

Css3 is the latest evolution of the cascading style sheets language and aims at extending css2.1. it brings a lot of new features and additions, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts.credits to medium for making this answer credits to google for copying this answercredits to me for putting this answer on your question