Answer:
in between your stitches are bars going horizontally.. gently spread your staitches apart and you will see the horizontal bar .. this is the bar.. to knit this bar you pick it up using your right hand needle and place it on your left needle then knit as if it is the next stitch you would be knitting .. make sure to knit it thru the back if you dont want a hole ( this will be twisting the bar ) or thru the front if you want a hole