A university is,to a great extent,a melting pot.Everyone [who] studies and lives there [brings] [his or her] own peculiarities to enrich the university's culture,[making it] easier for [him or her] to study harder under such strong[,diverse] atmosphere.
When you study [at] a university,you'll always find yourself bombarded with different views or new options,[forcing] you to think more and develop your own critical thinking skills.[Through] the process of thinking,criticizing and taking stock of yourself,you'll truly absorb something new [that] will help you become more creative [and] mature.
Another big plus to [studying] at a university is that you can capitalize on the colorful activities.[Attending various] activities will help you interact with other students and develop the interpersonal skills [needed to succeed later in life].
Note:Your English is fine,but you need to be more careful of grammatical inconsistencies and run-on sentences.In the first paragraph,if using a singular noun appears confusing,try substituting "everyone" with "students," then the paragraph will read smoother:
A university is,to a great extent,a melting pot.Students who study and live there bring their own peculiarities to enrich the university's culture,making it easier for them to study harder under such strong,diverse atmosphere.
Keep up the good work!