Final answer:
Miguel should attend language classes to improve his pronunciation and make his speeches more understandable, rather than speaking faster, using complex vocabulary, or ignoring his accent.
Step-by-step explanation:
Miguel, a college student from Panama in an exchange program, is facing challenges with his accent in the United States, affecting his speech comprehension during presentations. To help others understand his speeches better, the most effective strategy for Miguel would be to attend language classes to improve pronunciation. Language classes specifically designed for accent reduction can help him identify linguistic structures and learn the nuances of American English dialects, enhancing his ability to communicate more effectively. Speaking faster might worsen comprehension, using complex vocabulary is unlikely to address pronunciation issues, and ignoring the accent won't improve understanding. Instead, embracing his authentic voice while refining his accent can serve as a bridge, allowing him to convey his thoughts more clearly without compromising his linguistic identity.