Final answer:
Annabelle's activity of shopping for clothing and household goods online is best described as Online shopping, which is a modern form of consumerism involving purchasing items over the Internet.
Step-by-step explanation:
When Annabelle often shops for clothing and household goods online, this activity is best described as C) Online shopping. This concept pertains to the act of purchasing products or services over the Internet. Unlike the traditional shopping experience at department stores which marked a significant change in buying patterns, online shopping offers convenience and a broad selection without the need for physical travel. This form of consumerism stands on the pillars of e-commerce and can include a wide range of activities, such as ordering flowers over the internet for a friend in a different city or buying a used laptop computer at an online marketplace.