a solid natural material with a crystal structure a material that was once living but has decayed a liquid chemical used to make soil more fertile a nutrient produced by plants that other organisms need
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following best describes a mineral?
Possibilities:
- a solid natural material with a crystal structure
- a material that was once living but has decayed
- a liquid chemical used to make soil more fertile
- a nutrient produced by plants that other organisms need

a solid natural material with a crystal structure