Which of the following involves a small group discussion led by a facilitator to gather opinions?

The correct choice is focus group, as this method specifically involves gathering a small group of people to discuss a particular topic or issue, guided by a facilitator. The purpose of a focus group is to collect diverse opinions, feelings, and insights regarding products, services, or ideas. The facilitated discussion encourages interaction among participants, which can lead to richer and more nuanced information than might be collected through individual responses.

Surveys typically involve collecting data through questionnaires that respondents complete independently, not a group discussion. Think tanks, while they may involve discussions among experts, are often more about generating ideas and research proposals rather than gathering diverse consumer opinions in a structured focus group format. Analysis sessions generally focus on examining data or results rather than engaging in discussion to gather opinions.