To find sources that answer this question, Antonio should better broaden his question or make it less specific.
This question is too specific because it focuses on protection policies for a specific species (southern blue whales) in a very specific location (near the coast of Antarctica).
The best way is to make the question less specific or to broaden it. For example, “What environmental policies have been adopted to protect southern blue whales?”. This will increase the number of sources related to the question.
Learn more about sources in: https://brainly.com/question/2000970