Help working a thumb

The pattern says “Attach yarn to live sts on thumbhole”

What does this mean? Which are the “live sts”??

Thanks

Live sts are those which haven’t been bound off; they may be the on a stitch holder.

“Attach yarn to live sts on thumbhole”

This indicates that you either already have some stitch loops available to knit the thumb out of, for instance on a stitch holder, that you put there a bit earlier for that purpose, or… you need to pick up some stitches there. Probably the first. ‘’

If you have some stitches waiting, put them back on the dpns or however you are planning to knit the small circular thumb. Then just take your yarn and start knitting with it according to whatever the directions tell you.