In what context might someone use "fire crystals" and what is their typical application?
A) In crystal healing, fire crystals are believed to enhance passion and energy, and are used in meditation or placed in spaces to promote vitality.
B) In geology, fire crystals are used to measure the temperature of molten lava.
C) In cooking, fire crystals are used as a seasoning to add heat to dishes.
D) In electronics, fire crystals are used as components in circuit boards to improve conductivity.