Arial Black
Adventurer
Mechanically? None. There's some flavor connections, in some cases (bat guano, as a good source of nitrates, resonates flavorfully with fireball, for instance). But, no mechanical interaction at all.
What, none?
Components are necessary for the casting of the spell.
So there is one!
The relationship is that if the components haven't been provided, there is no spell effect!
If the components require you to, say, chant three words but you only chant two, then you haven't provided the required verbal component and so the spell never happens. Do you disagree? If so, why?