A fable. It typically involves animals or inanimate objects as characters that convey a moral lesson or message through their actions and behavior in the story.
Short story.
They are fables.
I assume that the synonym you are looking for is a 'parable', which is a short story, such as those Jesus told, which teaches a moral or spiritual lesson.
a parable.
A brief advertisement is called a blurb. A brief advertisement is called a blurb.
A Short Story
A brief narrative description of the journal article, document, or resource. == ==
"The Watch" by Elie Wiesel is a short story. It is a brief fictional work that tells a focused narrative.
A brief shower of rain can be called a "sprinkle," and a brief snowfall can be called a "flurry."
...A brief bikini? Aerie calls it a boykini.
A fable or parable is a brief story that teaches a lesson about human follies. Aesop and Jesus Christ are notable tellers of such tales.
answer is a brief answer is a brief