Which option describes cohesion in writing

The act of forming a logical whole
Providing reasons for a claim
Including details that support an idea
Drawing conclusions based on facts

The option that describes cohesion in writing is "including details that support an idea." Cohesion in writing refers to the use of various techniques to make the different parts of a text flow smoothly and coherently, creating a clear and understandable piece of writing. Including relevant details that support and reinforce the main ideas is one way to achieve cohesion in writing.