Test Question Analysis:

According to the map, there is a biogas digester in the area, and the biogas digester is suitable for construction in the area with sufficient heat conditions, so the ecological agriculture model is most suitable for promotion in the southern region. The model is the development of ecological agriculture, mainly in rural areas, towns and cities are mainly the development of secondary and tertiary industries; the figure of agro-ecological model reduces the emission of waste, waste recycling and reuse, is conducive to the improvement of the ecological environment; the agricultural model of both planting and animal husbandry, so belongs to the mixed agriculture.