how can i create a full width row for my website which is asjust in anyscreen and from that i can adjust a perticuler background to row like background color or background image?
You can use a responsive theme and Visual Composer plugin for this. Also, check my reply here:
Arjun Check this post over here.
Yes u can directly use responsive themes from wordpress. Or if you are creating own responsive wordpress theme, u can use bootstrap to make rows as you want.
Just for reference : https://wordpress.org/support/topic/how-to-create-a-responsive-theme-from-scratch
Visual Composer is best .