Rocks are made of one or more minerals. Rocks are made of two or more elements. Rocks are made of magma and sediments. Rocks are made of sand changed by pressure.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Students are comparing different rocks. What do all rocks have in common?
Possibilities:
- Rocks are made of one or more minerals.
- Rocks are made of two or more elements.
- Rocks are made of magma and sediments.
- Rocks are made of sand changed by pressure.

Rocks are made of one or more minerals.