"Just to set the record straight, 'magic' isn't a specific thing, really, just a layman's expression bundling together all kinds of energies and phenomena outside the material plane. But to answer your question, everything!
"It's a common misconception that the magic is only about mystic powers like Zora healing or shadow ninjutsu, or magical creatures like monsters and fairies and spirits. But all life has a little 'magic' in it, in the physical sense. Whenever you eat a meal that warms you up or gives you strength, it's because of the biological magic in the ingredients! Even organisms without overt magic effects rely on 'magical' energies a little to grow and develop correctly. If you try planting wheat in a planar isolation chamber, even if you give it plenty of water and sunlight, it'll come out unusually withered, or just die."