In Prepositions^x, Jokes^x, Paragraphs^x

Hi Nimet-- welcome to English Forums. The following words and phrases need some work: I want to start to make a short introduction on who I am and on my education. -- delete this sentence. in K.U. Leuven on a kind of -- change to 'an' only the relations or correlations -- choose one society,...

The word "to" is part of the infinitive, so "approach to manage" is a noun ("approach") followed by an infinitive ("to manage"). There is no preposition here. The "to" is not a preposition. You always use the gerund after a preposition. "Thank you for helping." -- never "Thank you for to...