Final answer:
The given sentence, "Bernardo always finds a way to get into trouble, for he is a precocious cat with free reign of the house while his owners are away from home," is an example of a complex sentence.
Therefore, the correct answer is: option "complex".
Step-by-step explanation:
The sentence is a complex sentence because it contains an independent clause ('Bernardo always finds a way to get into trouble') and at least one dependent clause ('for he is a precocious cat with free reign of the house while his owners are away from home'), which cannot stand alone as a complete sentence.
A complex sentence is a sentence that contains an independent clause and a dependent clause.
Complex sentences are often formed by putting these words at the beginning of the dependent clause: as, as if, before, after, because, though, even though, while, when, whenever, if, during, as soon as, as long as, since, until, unless, where, and wherever. These words are called subordinating conjunctions.
Understanding sentence structures, like recognizing complex sentences, is important as it helps in constructing clear and varied writing, which is essential in English grammar.