Final answer:
A visitor might be asked to leave the dog park if they brought in toys, such as a ball for their dog to fetch, since this is against the park's rules. The cause of the visitor being asked to leave the dog park would likely be:
c. The visitor threw a ball for his dog to fetch within the fenced area.
Step-by-step explanation:
A visitor could be asked to leave the dog park for a few reasons based on the rules stated in the event flyer. However, according to the passage provided, the scenario that would most likely lead to this request is if the visitor threw a ball for his dog to fetch within the fenced area. The flyer specifically states that no food or dog toys are allowed inside the fenced area, which includes items like balls used for fetching.
According to the passage, one of the dog park rules is "No food or dog toys allowed inside the fenced area." Throwing a ball for a dog to fetch would fall under the category of dog toys, and if done within the fenced area, it would be a violation of the rules, leading to the visitor being asked to leave.
The cause of the visitor being asked to leave the dog park would likely be:
c. The visitor threw a ball for his dog to fetch within the fenced area.