Answer the following question, with explanation first.
During the brainstorming session there was a lot of talking and what?\nOptions:\n- obtaining information\n- exchange of ideas\n- sharing information\n- conversation\n- gathhering of information

exchange of ideas
Exchange of ideas takes place in brainstorming session.

During the brainstorming session there was a lot of talking and exchange of ideas.

.

The answer: exchange of ideas