To determine which substance has the greatest density, we can look at the approximate densities of each option:
- Water: About 1 g/cm³
- Blood: Approximately 1.06 g/cm³
- Aluminum: Roughly 2.7 g/cm³
- Copper: About 8.96 g/cm³
- Granite: Generally around 2.75 g/cm³
By comparing these values, we can see that copper has the highest density at approximately 8.96 g/cm³, significantly higher than water, blood, aluminum, and granite. Therefore, the answer is:
Answer: d) Copper