Final answer:
Horses are grazers that spend several hours a day grazing on forage. The correct answer is d) Several hours a day.
Step-by-step explanation:
By nature, horses are considered grazers, and they typically spend several hours a day grazing on forage. The correct answer to the question regarding how much time horses spend grazing is d) Several hours a day. Horses have a digestive system that is designed to process forage slowly, allowing them to extract the necessary nutrients over an extended period of daily grazing.