Which of the following crops are primarily grown to provide feed for livestock?

Forage crops are specifically cultivated to produce feed for livestock, including animals such as cattle, sheep, and goats. These crops include grasses and legumes that have high nutritional value and are essential for maintaining the health and productivity of livestock. They can be either grazed directly by animals in pastures or harvested and stored as silage or hay for later use.

While field crops can also include some types of forage, they encompass a broader category that includes grains and legumes meant for human consumption or other uses. Row crops typically refer to crops grown in rows, such as corn, soybeans, and cotton, which are mainly cultivated for human consumption, industrial use, or biofuels rather than directly for feeding livestock. Vegetable crops are grown primarily for human consumption and are not aimed at livestock feed.

Thus, forage crops are the most appropriate choice when discussing crops specifically aimed at providing feed for livestock.