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Q&A Is the following analogy of natural selection effective and clear?

I'm writing a scene where one of the characters is explaining the process of natural selection: “Think of it as a beach full of crab holes of various shapes and sizes, and with little pebbles...

2 answers  ·  posted 10y ago by Alexandro Chen‭  ·  last activity 5y ago by System‭

#3: Attribution notice added by user avatar System‭ · 2019-12-08T03:48:07Z (almost 5 years ago)
Source: https://writers.stackexchange.com/q/13070
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision by user avatar Alexandro Chen‭ · 2019-12-08T03:48:07Z (almost 5 years ago)
I'm writing a scene where one of the characters is explaining the process of natural selection:

> “Think of it as a beach full of crab holes of various shapes and sizes, and with little pebbles on the upper part, sculpted over hundreds and hundreds of years by crashing waves. The pebbles are constantly being dragged down by the waves and occasionally fall inside the crab holes. These 'selected' pebbles aren't necessarily smoother or more symmetrical. On the contrary, they could be the most deformed of the bunch, it's just that they had the _right_ shape for a certain hole.

Is the analogy above effective and clear?

#1: Imported from external source by user avatar System‭ · 2014-10-10T03:46:07Z (about 10 years ago)
Original score: 1