Answer:
4. Feldspar, quartz and silicates.
Explanation:
1. Feldspar: This group consists of aluminium silicates of potassium, lime or soda. It's the most liberal mineral group of planet Earth. It is found in rocks, soils and clays. This group contains orthoclase, microcline and plagioclase sandstone.
2. Quartz: it's a chemical compound and it consists of one part of the silicon and two parts of oxygen. It is known for its variety of usefulness and it's the second most liberal mineral that exists on planet Earth. It's very resistant to any kind of weather and temperature whether it's extremely hot or cold, making it very important in many usages.
3. Silicates: being made of silicates groups, they are the largest class of minerals, taking up roughly 90% of the whole Earth's crust. The crust of planet Earth is being maintained by many processes, some of them are: melting, metamorphism, weather and crystallization.
