Can I use just HTML5 to create responsive page?

Answer 1

Not completely.
You need to add CSS and a litte magic of Java Script too

Answer 2

Bootstrap is also a good choice
https://www.sololearn.com/learn/1051/?ref=app

Answer 3

No,
Yes,
Bootstrap,
Or
HTML & CSS & JS

Answer 4

you can use animate tag in html 5 to build a simple animations
but of course for professional animations you will need a little of css and JavaScript using jQuery library

Answer 5

You can use the css rules, but in general you have to use mediaqueries, coding with a javascript files. This allow you to set a width and height, max and min value for every devices.
Responsive media queries work good only if you use the correct HTML rules.

Answer 6

Bootstrap is the answer to responsiveness

Answer 7

You can use HTML CSS and JavaScript.