Which of the following is an example of restricted merchandise?

The selection of elephant ivory as an example of restricted merchandise is based on legal regulations and conservation efforts aimed at protecting endangered species. Elephant ivory is highly regulated and often prohibited for trade due to the significant decline in elephant populations as a result of poaching and illegal trafficking. This classification as restricted merchandise is vital for the preservation of biodiversity and ensuring that protected species can thrive without the threat of extinction from illegal hunting.

In contrast, the other options do not have the same level of legal restriction. For instance, plastic goods and common textiles are typically freely traded and widely available in the marketplace. Hello Kitty merchandise, while potentially subject to trademark or licensing regulations, does not fall under the category of restricted merchandise in the environmental sense. Thus, being aware of what constitutes restricted merchandise is crucial in specialized fields like wildlife conservation and law enforcement.