Final answer:
Farmers buy things for their patients, such as medicine and equipment, to take care of their animals.
Step-by-step explanation:
Farmers buy things for their patients because they need various equipment and supplies to take care of their animals. For example, farmers may need to purchase medicine or vaccinations to treat sick animals, or they may need to buy feed and water containers to ensure their animals are well-nourished. Additionally, farmers may need to invest in farm machinery and equipment, such as tractors or milking machines, to efficiently manage their operations.