The value of rocks can indeed be assessed from various perspectives, and the statements you've mentioned reflect different viewpoints on this topic.
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Yes, rocks are valuable because they are useful to people. - This is true as many rocks are sources of valuable minerals, aggregate for construction, and other resources that serve various industries, including manufacturing and energy.
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No, rocks are not valuable because they contain a lot of waste. - While some rocks may contain waste materials or be less valuable due to impurities, many rocks are valuable regardless of this characteristic.
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No, rocks are not valuable because they are nonliving solids. - The nonliving nature of rocks does not determine their value. Instead, their chemical and physical properties, and how they can be used, influence their worth.
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Yes, rocks are valuable because they are part of Earth’s crust. - This is also true. The Earth's crust contains various minerals and resources that are essential for both natural processes and human use.
In conclusion, while not all rocks have inherent value, many do play a crucial role in various human endeavors and natural processes, making them valuable natural resources.