The correct answer is option 1, shifting cultivation, as it is an example of subsistence farming. Subsistence farming is a type of agricultural practice where the primary goal is to produce enough food and resources to meet the needs of a family or a small community. Shifting cultivation, also known as slash-and-burn agriculture, is a traditional method where small plots of land are cleared of vegetation and burned. The ash from the burned plants provides nutrients to the soil for cultivation. After a few years of use, the plot is abandoned and left fallow to regain fertility, while a new plot is cleared and cultivated.

Option 2, commercial farming, is not an example of subsistence farming. Commercial farming focuses on the production of crops or livestock for sale and profit rather than solely feeding the farmer`s family or community. Option 3, extensive and intensive farming, are not specific examples of subsistence farming either. Extensive farming refers to large-scale agriculture, such as large crop fields or extensive grazing by livestock. Intensive farming, on the other hand, involves high inputs of labor, capital, and technology to maximize output. Option 4, organic farming, can be practiced both in subsistence and commercial farming. It refers to the cultivation of crops without the