Question

which is a function sentence? the australian man designs yachts, he races them in international events. the map’s legend indicates the meaning of its symbols.

Explanation:

A run - on sentence is a sentence in which two or more independent clauses (complete sentences) are joined without proper punctuation or conjunctions. The first option "The Australian man designs yachts, he races them in international events." has two independent clauses ("The Australian man designs yachts" and "he races them in international events") joined only by a comma, which is a run - on (specifically a comma splice). The second option "The map's legend indicates the meaning of its symbols." is a single independent clause and is a correct sentence, not a run - on. Wait, but the question is "Which is a run - on sentence?". So the first sentence is the run - on. But maybe there was a typo in the question (maybe "run - on" instead of "function"?). Assuming it's a run - on sentence question:

Answer:

The Australian man designs yachts, he races them in international events.