A defining relative clause identifies who or what we are speaking about, whereas a non-defining relative clause just gives us more information about who or what we are speaking about. ... A non-defining relative clause is separated from the main part of the sentence by commas.
Answer:
The most persistent rivals were Poseidon, the sea god, and Athena, the goddess of wisdom. To solve their dispute, Zeus decided that each of them would make a gift to the city and king Cecrops would decide which gift was the best and therefore which god would be the patron of the city.
Answer:Adam abandoned the race to help John John.
Explanation: