Market research is defined as:

Market research is accurately defined as the process of collecting and analyzing information about market capabilities. This involves gathering data on various aspects of a market such as demand, competition, consumer behavior, and trends. By understanding these elements, businesses can better position themselves in the market, make informed decisions, and develop effective marketing strategies that align with consumer needs and preferences.

The other options do not encompass the full scope of what market research entails. Analyzing trends in the stock market is quite specific and does not reflect the broader context of market research. Studying consumer behavior is certainly an important component of market research, but it doesn't capture the complete picture of evaluating overall market capabilities, which includes understanding sales, distribution channels, and market segmentation. Negotiating contracts with suppliers relates to procurement and supply chain management, which is outside the definition of market research.