Final answer:
The sentence provided is a complex sentence, containing one independent clause and one dependent clause related to the main subject, Kino. The correct option is: B) Complex sentence
Step-by-step explanation:
The sentence 'Kino, who earns a living as a pearl diver, is barely able to support his wife and their baby son, Coyotito' is a complex sentence. This type of sentence has one independent clause ('Kino...is barely able to support his wife and their baby son, Coyotito') and at least one dependent or subordinate clause ('who earns a living as a pearl diver'). A complex sentence is designed to express a main idea (in the independent clause) and additional information that provides context (in the dependent clause).