The class rather than the spell description.
The class determines which components. For example, the Bard casts any spell using either Verbal (song, command, chant, etcetera) OR a musical instrument (as the material component), but the Dance Bard uses Somatic (dance) instead of Verbal.
Each class has its own method to cast spells. I can see the Ranger using parts of plants and animals for the material component. Perhaps Artificer uses various elemental ingredients, like alchemical salts, etcetera.