Final answer:
The sentence 'Because I’ve never left the country, I am so excited to visit Mexico.' is a complex sentence that consists of two clauses.
Step-by-step explanation:
The sentence 'Because I’ve never left the country, I am so excited to visit Mexico.' is a complex sentence. It consists of two clauses: 'Because I’ve never left the country' and 'I am so excited to visit Mexico.' The first clause is a dependent clause because it cannot stand alone as a complete thought, while the second clause is an independent clause because it can stand alone as a complete thought.