Which type of sheep meat accounts for more than 90% of the lamb meat produced in the US?

The correct answer is lamb, as it represents the majority of sheep meat production in the United States. Lamb is defined as the meat from sheep that are less than one year old, and it is favored for its tender texture and mild flavor, making it highly sought after in various cuisines. In the U.S. market, lamb is primarily produced from specific breeds that have desirable growth rates and meat quality, contributing to the statistic that lamb accounts for over 90% of the sheep meat produced.

Mutton, which is the meat from older sheep, is less popular in the U.S. and constitutes a much smaller percentage of sheep meat production. Veal, coming from young calves, and pork, from pigs, are entirely different sources of meat and do not relate to sheep at all, further emphasizing the dominance of lamb in this context. Thus, lamb firmly establishes itself as the primary source of sheep meat in the U.S. market.