What distinguishes a "silent auction" from other types of auctions?

A "silent auction" is characterized by the method in which bids are submitted. In this format, bidders provide written bids on bid sheets without any verbal announcements by an auctioneer. This allows participants to submit their bids privately and can create a more discreet bidding atmosphere compared to traditional auctions where bids are shouted out loud.

The process encourages bidders to consider their offers carefully and can lead to a different dynamic in how the auction unfolds, as participants do not know how much others are bidding. This method typically takes place in settings where multiple items are auctioned simultaneously, often at fundraisers or charity events.

Other choices represent different auction characteristics: calling bids out loud defines a traditional auction format, the notion that items are sold only if there are no bids at all does not apply to silent auctions, and conducting bids online typically refers to online auctions rather than silent auctions specifically. Therefore, the written submission of bids without verbal announcements is what clearly sets silent auctions apart.