how to improve English rearrangement section

Are you talking about para jumbles ? 

Hi @ravichandra hugar ,

Here are a few pointers to help you with Para Jumbles questions:

Important Points to note: 
1. Try to find Main Point of the paragraph. As the sentences when constructed to make a paragraph presents an idea. Try to find that idea and see what role a particular sentence will play to depict the whole picture. Then arrange them accordingly to make paragraph coherent.
2. Try to see verbal connectives and logical connectives as they give hints regarding constructing the paragraph logically.
3. Try to see analogies as they should proceed with real life examples.

Or check this para jumbles answer by top writer @PvAaditya