Final answer:
The greatest agricultural expansion as identified by Foley et al. 2011 is occurring in Latin America, which is surpassing other regions due to its increased agricultural activities and investments to meet food demand.
Step-by-step explanation:
According to Foley et al. 2011, the region experiencing the greatest agricultural expansion is Latin America. This is due to various factors such as the availability of arable land and the increase in agricultural investments and activities in the region. Latin American countries have been expanding their agricultural frontiers to meet both global and local food demand.
By contrast, while North America, particularly the Midwest and the Great Plains, remain crucial food-producing areas and the economic core, it is not experiencing the same rate of agricultural expansion as Latin America. North American agriculture is characterized by mechanization and large-scale farms producing for the market economy. However, Latin America's agricultural growth is more notable in the present context of global agricultural dynamics.