Milpa and Ladang are different names for shifting cultivation. Shifting cultivation is an agricultural practice where farmers clear a patch of land, cultivate it for a few years until the soil fertility declines, and then move on to another plot of land. Milpa is the name for this practice in Mexico and Central America, while Ladang is the term used in Southeast Asia.

Option 1, shifting cultivation, is the correct answer as it accurately describes Milpa and Ladang. Shifting cultivation is a traditional method of farming that has been practiced by indigenous communities for generations. It is characterized by the rotation of agricultural plots and allows the land to recover its fertility before being cultivated again. This practice is often employed in areas with poor soil quality or limited access to modern agricultural techniques.

Options 2, mixed farming, and option 3, truck farming, are not accurate descriptions of Milpa and Ladang. Mixed farming refers to the simultaneous cultivation of crops and livestock, while truck farming refers to the production of high-value crops for sale in local markets.

Option 4, plantation agriculture, is also not an accurate description of Milpa and Ladang. Plantation agriculture refers to large-scale farming operations that focus on the cultivation of cash crops such as coffee, tea, or rubber.