The individual engaged in subsistence agriculture is Chang, who farms a small plot of land from which he harvests just enough food to feed his family. Subsistence agriculture is a type of agriculture in which farmers produce only enough food to feed themselves and their families, with little or no surplus for sale or trade. It is typically practiced in rural areas of developing countries, where access to modern agricultural technology, markets, and infrastructure is limited. In contrast, Victor sells his produce in a city market, Roberto runs a farm that sells crops to a pet food manufacturer, and Nareesh works in a factory during the day and cultivates a small vegetable garden on the side. These activities do not qualify as subsistence agriculture because they involve the production of goods for sale or trade, rather than solely for the purpose of self-sustenance.