1. They are related and stick together
2. Especially
3. One reason is that
4. For example
kyojuro rengoku is right 100%
The sentence that describes what it means for ideas to have cohesion is: Ideas have cohesion when they are logically connected and flow smoothly from one to another.
The sentence that describes what it means for ideas to have cohesion is: "Ideas have cohesion when they are logically connected and flow smoothly from one to another, creating a unified and coherent message."