Cohesion in English grammar refers to the way various elements in a paragraph or text are connected and organized to create a smooth and coherent flow of information. It ensures that ideas are linked together logically, making the text easier to understand and follow.
One common aspect of cohesion is achieved through the use of cohesive devices such as pronouns, conjunctions, and transitional words. These help establish relationships between different parts of a sentence or between sentences, guiding the reader through the ideas being presented.
In other words, The usage of words/phrases which builds a link to other words/phrases in a same or different text is called "Cohesion".
Example:
Every Culture has attempted to interpret the meaning of dreams. In some cultures preople believed that during a dream the spirit leaves the body and travels around. Others believed that the future can be seen in dreams. For example, a pleasant dream might suggest good fortune the next day. This is still believed by some cultures today.
Later on, Sigmund Freud, the famous psychologist, came up with another theory. Freud analysed the dreams of many people. He concluded that dreams reflect our inner psychological world- our unconscious wants and concerns. This idea was popular for a long time.
Observe the text above. The Underlined words/phrases are linked to other statements in some way.
"In some culture" refers to Cultures in the 1st sentence.
"Others" also refer to Cultures in the 1st sentence.
"For example" is giving example for the pervious statement.
"This" is refered to the pleasant dream which is mentioned in the previous statement.
"Came up with another theory" refers to the dreams in the 1st paragraph.
"Freud" & "He" refers to Sigmund Freud.
"This Idea" refers to the Sigmund's theory.
In this way, Cohesion can be constructed in your paragraph to make it sound beautiful and meaningful.