The American Eurocopter company shows its product on a large yacht in its advertising in the hope that it will appeal to the upper strata of , which refers to relatively homogeneous divisions in a society into which people sharing similar lifestyles, values, norms, behaviors, and interests can be grouped.

social class

Explanation: A social class can be described as a group of people within a society with similar social and economic status. The American Eurocopter company is showing their products to the group on the yatch because they belong to their target audience i.e the products are designed to appeal to individuals with taste similar to those on the yatch.

The reaction to the products by the group on the yatch could be indicative of how the social class the products are meant for would react to them as the group is a subset of their class. If the products appealed to the group, it will most likely appeal to the entire social class.

explanation:

may i ask what challenges?

earthquake fault lines