Abrasion means scraping or wearing away. Thus option A is correct
What is abrasion ?
Abrasion is easily recognized form of wear.
The hard particles can scratch softer surfaces when they are forced.
It can be associated either with surface movement with packed particles soil, sand, rocks or hard particles trapped between machine surfaces.
There are two types of abrasion such as low stress abrasion other wise known as two-body abrasion.
secondly high stress abrasion or three-body abrasion which is more severe because it can increases the chances of fracture of the abrasive particles.
Quartz is a hard, crystalline second most abundant mineral available in earth's crust made up of silicon dioxide.
One of best classified quartz is called as gemstones and antiquity a variety of quartz commonly used in jewelry and hardstone carvings. It is a substance which undergo abrasion for a long period.
Hence option A is correct.
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