Sand particles are made of

Answer: Option A

Sand particles are made of rock minerals.

Sand primarily consists of small fragments of weathered rock and minerals, predominantly quartz, which is a durable and resistant mineral.

Kaolinite, illite, and montmorillonite are types of clay minerals, which are much finer in particle size compared to sand and have different properties and compositions.

Therefore, the correct answer is that sand particles are composed of rock minerals.