Question

1 which of the following uses commas correctly? st. petersburg, russia, is known as the city of islands and boasts nearly seventy canals rivers and streams st petersburg, russia, is known as the city of, islands, and boasts nearly seventy canals, rivers, and streams st. petersburg, russia, is known as the city of islands and boasts nearly seventy, canals, rivers, and streams st petersburg, russia, is known as the city of islands and boasts nearly seventy canals, rivers, and streams

Explanation:

In English grammar, a comma is used to separate a city - country/state pair, and also to separate items in a list. In the correct sentence, "St. Petersburg, Russia" is the city - country pair, and "canals, rivers, and streams" is the list of items. The other options have incorrect comma placements.

Answer:

St. Petersburg, Russia, is known as the city of islands and boasts nearly seventy canals, rivers, and streams