Final answer:
Mature cattle fed on a diet of corn and silage are often processed into ground beef and other products. Grass-fed beef is considered healthier and can command higher prices. Both grass-fed and grain-fed cattle can be sources of ground beef.
Step-by-step explanation:
The categories of beef that come from mature animals and are often used for ground products are typically sourced from cattle that have been raised primarily for this purpose. These cattle are usually kept on a diet of corn and silage, and once they reach suitable weight, they are processed into various beef products such as hamburgers, steaks, and ground beef. Ground beef is a common product from mature cattle, especially from less tender cuts or from older animals whose meat may not be as suitable for individual steaks or roasts. Certain types of beef like grass-fed beef are regarded as healthier and better tasting, and such beef can command a higher market price. Grass-fed and grain-fed cattle can both be sources of ground beef, although the flavor and nutritional content may vary.