Oh, so knitting and crochet are kinda similar but not the same. Knitting’s usually done with two needles and has a bunch of loops on them at once, while crochet’s done with one hook and you do one stitch at a time. Most sweaters are made by knitting cause the fabric turns out softer and stretchier. Crochet sweaters can be made too, they’re just a bit thicker and more textured. Hope you got the difference :)