উত্তরবাজারের (Market) বৈশিষ্ট্য হলো- (Note: The original question text 'উক্ত সংজ্ঞা অনুসারে বাজারের বৈশিষ্ট্য হলো-' implies a specific definition was provided in a previous context. However, based on standard economic definitions of a market, the core characteristic is the determination of price through bargaining between buyers and sellers. Let's assume the question asks for the primary characteristic of a market in general economic terms or based on a standard definition often cited in textbooks.)