Answer:
Psychographic Segmentation
Explanation:
Psychographic Segmentation is a technique used in grouping or determining a market segment based on personality traits, beliefs, lifestyle choices, interest and other factors. It is a technique used in market Segmentation to determine target customers using psychological traits of individuals lifestyle that determines consumption habits. In this case, because Daniel joined an outdoor activities club and began to purchase books concerning outdoors, borders bookstore uses it as an opportunity to send promotions focusing on outdoor activities influenced by Daniel's lifestyle.