Solution
Option 1 -> This relates to pricing strategies, costs, and payment terms, which are not mentioned in the statement about appliances.
Option 2 -> This concerns the actual goods/services, their features, quality, design, and materials - which directly matches the description of eco-friendly appliances with specific features and sustainable materials.
Option 3 -> This involves distribution channels and locations where products are available, which is not referenced in the given statement.
Option 4 -> This covers advertising and communication strategies used to inform customers, not the actual product characteristics described here.
Hence, Option 2: Product -> The statement describes the physical product itself, its features (energy-efficient), and materials (environmentally sustainable), which are core components of the Product element in the marketing mix -> correct