Which sentence describes what it means for ideas to have cohesion?

• They are from sources that are up to date.
• They are supported by evidence.
• They are related and stick together.
• They make sense logically.

The sentence that describes what it means for ideas to have cohesion is: "They are related and stick together."

To understand the concept of cohesive ideas, one needs to consider how ideas are organized and connected within a piece of writing or discourse. Cohesion refers to the extent to which ideas, sentences, and paragraphs in a text are logically and clearly connected to one another.

When ideas have cohesion, it means that they are related and stick together in a logical and coherent manner. This ensures that the information flows smoothly and is easy to understand for the reader. Cohesive ideas are typically connected through the use of transitional words and phrases, such as "however," "therefore," or "in addition." These words help to establish the relationships between different ideas and create a clear structure for the text.

While the other options mentioned in the question—being from up-to-date sources, supported by evidence, and making sense logically—are important aspects of effective communication and writing, they do not specifically address the concept of cohesion. Cohesion specifically refers to the connection and relationship between ideas within a text.