Final answer:
Marks & Spencer (M&S) best fits into the category of sustainable practices within global retailing, as it works towards eco-friendly production in line with industry trends.
Step-by-step explanation:
The approach that Britain's Marks & Spencer (M&S) to global retailing that best describes their strategy is sustainable practices. The company aligns with the broader industry movement towards sustainability, echoing efforts by other retailers such as Inditex's Zara, which pledged to produce all clothes from sustainable or recycled materials by 2025. This commitment is a response to increased consumer awareness and demand for eco-friendly products, as global concerns about the environment have influenced consumer behavior and industry standards. The global expansion of markets driven by technologies and globalization, where businesses can operate on an international scale with relative ease, has also played a part in how M&S shapes its strategies. However, M&S’s most notable strategy is its focus on sustainability, which includes efforts to minimize environmental impact and invest in greener practices, in contrast to the other options like global expansion, online retailing, or luxury retailing.