Question

what is the meaning of the word pertain as used in the passage? juan is studying veterinary medicine at university, so he often reads books and magazines that pertain to animal health issues. articles that relate to the latest medications and treatments available for horses are of particular interest to him, since he plans to be an equine veterinarian—a vet who specializes in the care of horses. to have similar opinions to have to do with to fit together

Explanation:

To determine the meaning of "pertain", we analyze the context. Juan studies veterinary medicine and reads materials related to animal health. The sentence "Articles that relate to..." provides a clue. "To have to do with" matches the idea of being related to a topic, while the other options don't fit: "to have similar opinions" is about agreement, and "to fit together" is about physical or conceptual fitting, not relevance.

Answer:

to have to do with