Which statement about volcanic ash is correct?

Volcanic ash is known to be highly abrasive and can cause significant damage to aircraft engines. When aircraft encounter volcanic ash, the fine particles can be ingested into engines, leading to erosion of turbine blades, clogging of air filters, and other critical malfunctions. This abrasive nature not only affects the immediate operational integrity of the engine but can also have long-term consequences on the metal surfaces inside.

Additionally, volcanic ash can cause other issues such as reducing visibility for pilots and affecting the performance of navigation systems. Thus, understanding the potential hazards associated with volcanic ash is crucial for aviation safety. This makes the statement about volcanic ash being abrasive and capable of damaging engines correct.