The document discusses why farmers in a rural village grow certain crops such as oil palm, rubber trees, and rice. It provides details on the suitable growing conditions for each crop, including soil type, climate, and differences between C3 and C4 plants. Specifically: 1) Oil palm, rubber trees, and rice are grown because the land has fertile soil and suitable conditions for these commercial crops. 2) Oil palm and rubber trees can grow in a variety of soil types as long as the soil has good drainage. Rice grows best in humid, flooded soil. 3) Each crop thrives under different temperature and rainfall conditions that are typical for the region.