The law primarily uses the notion of the consumer in relation to consumer protection laws, and the definition of consumer is often restricted to living persons (i.e. not corporations or businesses) and excludes commercial users. A typical legal rationale for protecting the consumer is based on the notion of policing market failures and inefficiencies, such as inequalities of bargaining power between a consumer and a business. As of all potential voters are also consumers, consumer protection takes on a clear political significance.
The entire line runs under or near Sheppard Avenue East. All of its stations connect to surface TTC bus routes. All stations have elevators for wheelchair access, and public art; noteworthy examples are the scenic mural at Sheppard–Yonge, the illusionary sketches at Bayview, and Leslie Station’s hundreds of tiles showing the words “Sheppard & Leslie” handwritten by members of the public.
When the subway opened it was given the name "Sheppard line" and the official name 4 Sheppard Subway.
In October 2013, the TTC announced plans to give the lines official numbers to help riders and visitors to navigate the system. The Sheppard line is numbered as Line 4 and the new signage commenced in March 2014.
Consumers are typically viewed as predatory animals such as the wolf and hyena. However, herbivorous animals and parasitic fungi are also consumers. Some carnivorous plants, like the Venus flytrap, are classified as both.
Within an ecological food chain, consumers are categorized into three groups: primary consumers, secondary consumers, and the tertiary consumers. Primary consumers are usually herbivores, feeding on plants and fungus. Secondary consumers, on the other hand, are mainly carnivores, and prey on other animals. Omnivores, who feed on both plants and animals, can also be considered a secondary consumer. Tertiary consumers, sometimes also known as apex predators, are usually at the top of food chains, capable of feeding on secondary consumers and primary consumers. Tertiary consumers can be either fully carnivorous or omnivorous. Humans are one such example of a tertiary consumer.