Answer:
Since you have not specified a subject for the argument, the thesis statement shown below refers to an argument about the importance of reading.
"Reading stimulates an individual's cognitive development, allowing him to have a greater perception of his social, civil, political, economic and cultural responsibilities."
Explanation:
A thesis statement is established through a sentence that addresses the main theme of an essay or research, exposing that theme and the position of the author of the text in relation to it directly and clearly. Thus, the thesis statement establishes not only the subject and the main claim that will be addressed in the text, but also determines the tone of the work.
Similes compare two things. Because clowns are considered by most to be very funny, the object would also have to be something funny.
Therefore you could say...
A clown is as funny as a medieval joker.
A clown is as funny as a cat barking like a dog.
A clown is as funny as a comedy movie.
