English 6th Grade SOL Practice Test

The final comma before “and” is the serial (or Oxford) comma. Its job is to separate the last item from the rest of the list, helping show that all items are distinct. Whether you use it depends on the style guide you’re following, so it’s optional in many contexts. For example, “apples, oranges, and bananas” uses the comma to make three separate items clear; some writing omits that comma and writes “apples, oranges and bananas” instead, which is also acceptable in many cases but can be less clear in longer or more complex lists. The function described here is about separating the final item from the preceding items, not about starting a list, turning it into a question, or doing anything else.