Choose the meaning of the underlined proverb. At the conference, all the tech entrepreneurs ended up sitting at the same table, brainstorming ideas late into the night—truly, birds of a feather flock together.

1. Entrepreneurs prefer to work alone.
2. Success comes only from working with strangers.
3. People from different backgrounds like to mix freely.
4. People with similar interests tend to group together. Select the word which means the same as the group of words