Yes, backlinks play an important role in SEO work,

Backlinks are most important for a ranking of keywords

yes backlinks are the must for SEO because generating backlinks are the main work for SEO

I think you need a lot of backlinks The same topic sites then regularly update your website content so helpful with customers

Yes backlinks are very much important but i think you should start with on page techniques.

Back link is one kind of recommendation and you need to good recommendation to do well in Search engines. So link building is inevitable part in SEO.

Yes, Backlinks are important in SEO point of view, but it should be good and high PR backlinks