Why do urban residents need to rely on food grown in rural areas?

Urban (city) areas rely on food from rural (countryside) areas because in urban citites, there aren't a lot of backyards. People stay in tall apart building built on concrete. There are a lot of streets and sidewalks. Downtown is an urban area. When you go downtown, you don't get much grass and certainly not much open area to grow crops.

Explanation:

1) technical language (writen technical volcabulary)

2) ordinary langauge

3) literary language (because it's text with a rich, descriptive vocabulary)

4) scientific texts (includes texts such as medical reports, legal texts, academic journals, etc)

5) informational texts (texts that are used to convey information to readers, such as technical guides, costumer guides, textbooks)

6) poetic texts. because they are essays, short stories, poems, etc.