Beef has many primal sections; the chuck, ribs, short loin, sirloin, round, flank, short plate, brisket, shank, and beef is rated by the USDA. Prime has the most marbling, followed by Choice, then Select, which has the least.
Prime also cost the most because only four percent of the animals meat qualifies as prime. These are the steakhouse or butcher shop quality meat; ribeye, porterhouse, t-bone, sirloin, and fillet. These Prime cuts are the best for grilling, because the marbling melts as it cooks and infuses the meat with flavor, by keeping it moist.