In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Let me give you an example: The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
The answer to this example can be: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Here is why: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

OK. solve this:
Island dwarfism , or insular dwarfism , is the reduction in size of large animals over a number of generations .
Answer:
Insular dwarfism , a form of phyletic dwarfism , is the process and condition of large animals evolving or having a reduced body size when their population 's range is limited to a small environment , primarily islands .