Question

what is the meaning of the word pertain as used in the passage? brett 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 to do with to fit together to have similar opinions

Explanation:

In the context, Brett reads materials related to animal - health issues. "Pertain" here means to be related or have to do with something. The other options "to fit together" and "to have similar opinions" do not match the context.

Answer:

to have to do with