Which of the following will you build cohesion in your paragraphs?

You did not include the options in your question, but the following details will help you to determine the correct option.
In essay writing, cohesion refers to the manner in which your sentences and paragraphs flow smoothly all along the essay. There are some strategies, which can be used to create cohesion in one's essay writing, they include the following:
1. Use theme and thematic progression to carry your major ideas throughout the text.
2. Use repetition to enhance your readers' understanding.
3. Use forward and backward references in your work to pick up the information you already refereed to in the essay.
4. Use conjunctions to place different information into meaning relationships with one another.

The first one is sec.-b,,third- that