I'm not sure what you are after with your question. Certainly you don't want one of us to write on a topic for you, do you? The question is so vague I don't know what you need.
If you just want some ideas about what to write on, one of the periods of English literature that is easy to find information on is Romanticism. I'll put the link to the enotes Study Guide on the topic below.
In short, you could think about writing on the following:
- the major poets of Romanticism
- the major themes in their poetry
- what ideas the poets were reacting against
- the backgrounds of the poets
- the legacy Romanticism left to literature and art
- what poems are the most famous from the period
- what got Romanticism started
Your text book and the Internet, as well as enotes, should provide you with plenty of information to write on the topic of Romanticism.