In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: Organisms categorized by what species descriptor demonstrate a version of allopatric speciation and have limited regions of overlap with one another, but where they overlap they interbreed successfully? Answer: ring species
[A]: Organisms categorized by ring species species descriptor demonstrate a version of allopatric speciation and have limited regions of overlap with one another, but where they overlap they interbreed successfully.


[Q]: Question: What do you call a group of organisms of the same species that live in the same area? Answer: population
[A]: You call a group of organisms of the same species that live in the same area a(n) population.


[Q]: Question: What compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization? Answer: hydrocarbons
[A]:
Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.