Question

name the view used to delete section break

Answer 1

display section breaks so you can delete the ones you don't want, use Show/Hide.

On the Home tab, in the Paragraph group, click Show/Hide . Section breaks look like this: ...

To delete, place your cursor just before the section break and press Delete.
Hope it will help you

Answer 2

page break preview is used to delete a section break inserted in a doc