A few noob HTML/CSS questions

Q1: Are line breaks still used in html? Is it improve to have x number of <br>'s in a row? if so, how is that supposed to be done (space down x amount of times)?

Q2: To insert image onto a page (not as a background, just normal pic) is normal HTML <img> tag still used? Or is it done somehow in CSS?

Thank you :D, I apologize for my noobishness and 90’s style html coding :hugegrin: