Final answer:
The temperature of metamorphic minerals in aureoles around felsic bodies is generally lower than in those around mafic magmas, due to the different thermal regimes provided by the varying depths at which these magmas form. The correct option is 2.
Step-by-step explanation:
The relationship between the temperature of metamorphic minerals in aureoles surrounding felsic bodies and mafic magmas is that the temperature of metamorphic minerals in aureoles around felsic bodies is generally lower than that in mafic magmas. Mafic magmas originate from deeper within the Earth and are typically hotter, while felsic magmas are cooler as they form at shallower depths. Metamorphism around a mafic body is therefore expected to show minerals formed at higher temperatures compared to those around the generally cooler felsic magmas.
Referring to the description about metamorphic rocks, temperature plays a key role in the formation of different minerals during metamorphism. Felsic and mafic magmas, due to their different compositions and formation depths, provide different thermal regimes which lead to the formation of various index minerals that can indicate metamorphic conditions. For example, higher temperatures can lead to the formation of minerals such as sillimanite, whereas lower temperatures might result in chlorite or biotite.
Hence, Option 2 is correct.