Reduction. KMnO4 is an oxidizing agent(oxidizes substances) Therefore it is reduced. The MnO4-(purple colour) from the KMnO4 is reduced to Mn2+(pale pink/ colourless).
Based on the above descriptions provided for silicon, I'm assuming that you want to know what silicon is categorized as, in the periodic table, since it posses some properties of metals and nonmetals it would be classified as a mettaloid or a semi metal.