What you posted makes no sense. Please use complete sentences and/or questions with at least minimally correct capitals and punctuation so someone can understand what you're writing.
Please also remember that no one here will do your work for you. Once you've at least made an attempt, you should post again and someone here will be happy to comment on your ideas.
what is classical era and romanticism
A search engine again would help you with this. Check your notes or textbooks from music class: these are pretty basic topics, so I'm sure your teacher would have given you some info on them. If not, just google it. This is not the kind of question people on jiskha will explain for you, but once you have your essay written, we can read it.
There are good explanations in those search results.
I would suggest that you google these words together, for example "mozart prodigy" or "mozart chamber," etc. Find out what significance they play in Mozart's life, and then write a paragraph. You could organzize your paragraph in order of Mozart's age, or by topic (Mozart's musical pieces, Mozart's family life, Mozart's death). This is the sort of assignment that you don't really need Jiskha for, all you need is a search engine, or a book.
well he was a child prodigy because he learned music at a young age and was succelssful and genious just listen/ take a look at his music. he also created various works for different groups of instruments such as songs only for a few woodwind instruments called chamber music.