92．The different uses to which societies put these materials are ofinterest to anthropologists who may ask，for example，why a people chooses to use clay and not copper when both items areavailable．

(The different uses…are of interest to anthropologists…为句子主干)

各个社会对这些材料的不同用途是人类学家所感兴趣的，例如这些人类学家或许会问，当两种东西都能够得到时，为什么一个民族会选择使用粘土而不是铜。

分句1：The different uses are of interestto anthropologists

分句2：to which societies put thesematerials

分句3：who may ask，for example，why a people chooses to use clayand not copper when both items are available．

1和2嵌套，2中的介词to应在put之后，2定语修饰1中的uses

3和1嵌套，3中的who引导的定语修饰1中的anthropologists