What is a significant concern regarding factory farming highlighted in the discussion?

The significant concern regarding factory farming is primarily centered around animal welfare issues. Factory farming often prioritizes high production and efficiency over the well-being of the animals. This results in overcrowded living conditions, restricted movement, and lack of access to outdoor environments, which can lead to physical and psychological distress for the animals.

Critics argue that such practices are inhumane and raise ethical questions about the treatment of livestock. These concerns have sparked debates about the sustainability of factory farming systems and have led to calls for more humane practices and better regulations to ensure animal welfare. The other options, while they may have some relevance in the broader agricultural and economic landscape, do not address the ethical implications of how animals are raised and treated within factory farming systems.