Why it is possibly more efficient to grow crops than rear animals in densely population countries?

Growing crops in densely populated countries is often more efficient than rearing animals due to lower resource requirements, such as land, water, and feed. Crop production typically yields more food per acre than livestock farming, enabling better food security for large populations. Additionally, plant-based diets generally have a smaller carbon footprint and require fewer inputs, making them more sustainable in urbanized areas where space and resources are limited. This efficiency helps meet the nutritional needs of a growing population while minimizing environmental impact.