<Li> Sapphires, etc . </Li> <Li> Metallic primate: gold <Ul> <Li> Gold </Li> <Li> Silver </Li> <Li> Iron (and steel) </Li> <Li> Bronze </Li> <Li> Copper, etc . </Li> </Ul> </Li> <Ul> <Li> Gold </Li> <Li> Silver </Li> <Li> Iron (and steel) </Li> <Li> Bronze </Li> <Li> Copper, etc . </Li> </Ul> <Li> Iron (and steel) </Li>

Which of the following statements best describes the theme of top of the food chain