Correct Option: A. Growing crops and rearing animals on a given land area Detailed Explanation: Definition of Mixed Farming: Mixed farming is an agricultural practice that involves the simultaneous cultivation of crops and the rearing of livestock on the same piece of land. This method is designed to maximize the use of land and resources, allowing farmers to diversify their production and reduce risks associated with relying on a single source of income. Why Option A is Correct: - Combination of Activities: Option A accurately describes mixed farming as it encompasses both crop production and animal husbandry. This dual approach allows farmers to benefit from the synergies between crops and livestock. For example, animal manure can be used to fertilize crops, while crop residues can serve as feed for animals. - Resource Efficiency: By integrating crops and livestock, farmers can optimize land use and improve overall farm productivity. This method can lead to better soil health, reduced pest and disease pressure, and enhanced biodiversity. - Economic Stability: Mixed farming can provide a more stable income for farmers. If crop prices fall, livestock can still provide a source of income, and vice versa. This diversification helps mitigate the risks associated with market fluctuations. Why the Other Options are Wrong or Weaker: Option B: Keeping poultry and rearing pigs on one and the same farm - Narrow Focus: While this option describes a form of mixed farming, it is too specific. Mixed farming is not limited to just poultry and pigs; it includes a broader range of crops and livestock. Therefore, this option does not capture the full essence of mixed farming. Option C: Growing grains and root crops on the same piece of land - Limited Scope: This option focuses solely on crop production and does not mention livestock. While growing different types of crops can be part of a mixed farming system, the definition of mixed farming specifically includes both crops and animals. Thus, this option is incomplete. Option D: Mixed cultivation of wheat, barley, and oats - Crop-Centric: Similar to Option C, this option only addresses the cultivation of various crops without including any livestock. While it describes a form of crop rotation or intercropping, it does not fulfill the definition of mixed farming, which requires the integration of both crops and animals. Summary of Key Points:

• Mixed farming involves both crop cultivation and livestock rearing on the same land.
• It promotes resource efficiency and economic stability through diversification.
• Options B, C, and D are too specific or incomplete, failing to encompass the full definition of mixed farming.

Revision Summary:

• Mixed farming combines crops and livestock for better resource use.
• It enhances farm productivity and provides economic stability.
• Options that focus solely on crops or specific animals do not fully represent mixed farming.