Based on the provided contexts, the term "Accumulation Culture" is not explicitly defined. However, it can be inferred that it refers to high food accumulation culture [1] [3] [5]. This culture is distinguished by producing and storing food for long periods of time. The term "accumulation" in this context relates to the food produced and stored, not to a general insatiable desire to accumulate things. Therefore, the statement "it is a culture that is never satisfied" is not accurate in this context.

As for the other statements, the contexts do not provide sufficient information to definitively say whether high food accumulation culture is "sustainable" or "it separates the people from the land and appreciating nature." However, it is mentioned that this type of culture encourages obedience, compliance, and survival of the group [3], which could imply a certain level of sustainability as the culture is focused on survival.

Regarding the statement "it is a culture that is addicted to accumulating things," while the term "accumulation" is used, it specifically refers to food accumulation, not an addiction to accumulating things in general. Therefore, this statement is not accurate in this context.