What is a comparison based on similarity between things that are otherwise dissimilar

Analogy.

Explanation:

An analogy is a comparison made between ideas/things that are often quite different. Analogy is more elaborate and detailed than a metaphor or a simile.

An example of an analogy is found in Shakespeare's Romeo and Juliet, Act II, Scene II. Juliet explains that her love for Romeo will remain the same, even if he changes his name. Similarly, a rose will always smell sweet, regardless of the name by which it is called:

"What’s in a name? That which we call a rose

By any other word would smell as sweet.

So Romeo would, were he not Romeo called"

buenas noches would be your answer

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.