According to one of the commandments, which of the following is prohibited for animals?

The correct answer is that animals are prohibited from wearing clothes. This prohibition is explicitly stated in the Seven Commandments established by the animals after their rebellion, which aims to distinguish themselves from humans, who are seen as oppressors. The commandment reflects the idea that clothing is a symbol of human oppression and that by not wearing clothes, the animals maintain their identity and ensure equality among themselves.

Wearing clothes represents an association with human behaviors and social structures, which the animals sought to overthrow during their revolution. The rationale behind prohibiting clothes is to avoid adopting the vices of their former human masters and to promote a sense of unity and camaraderie among the animals. The other options, while related to attire, do not hold the same significance in the context of the farm's commandments.