which one is the simple sentence?

The question is asking you to identify which of the sentence options is an example of a simple sentence. A simple sentence has only one independent clause, which means it has one subject and one predicate. Out of the choices given, "I know the place of his living" is the only sentence that meets this criteria. It has one subject ("I") and one predicate ("know the place of his living"). The other options have more than one clause, meaning they are compound or complex sentences. For example, "I know the place where he lives" has two clauses ("I know" and "where he lives"), making it a complex sentence. Therefore, the correct answer is "I know the place of his living" because it is the only option that is a simple sentence with one independent clause.