Final answer:
The four land animals most commonly eaten by humans are chicken, cattle, pigs, and sheep, although ancient diets varied widely and consumption today still depends on cultural and religious practices.
Step-by-step explanation:
The four land animals most commonly eaten by humans are not explicitly listed in the provided reference material. However, considering common global dietary patterns, it's widely accepted that the four most commonly consumed land animals are chicken, cattle (for beef), pigs (for pork), and sheep (for mutton and lamb). These animals are raised and processed in large numbers around the world to meet the dietary preferences and nutritional needs of humans. Preferences have evolved historically and geographically, but these four species represent a significant portion of the meat consumed.
In ancient times, the diet of humans consisted of a broad range of sources, including nuts, fruits, and various animals depending on the environment. Humans scavenged or hunted based on availability, often focusing on smaller animals due to the limitations of ancient hunting techniques. Today, modern agriculture and animal husbandry have standardized the animals humans most commonly consume.
It is essential to note that the consumption of these animals varies based on cultural preferences and ethical beliefs. For instance, the consumption of beef is prevalent in many parts of the world, while pork is avoided in Islamic and Jewish cultures due to religious restrictions. Similarly, some cultures may include other land animals in their diet that are less common on a global scale.