There are 12 mating pairs which are illustrated in model 1.
What is a Mating pair?
These are groups of organisms which are involved in reproduction over
a period of time. Some animals choose their mating pairs depending in the
season in which they copulate and produce offsprings.
In the model 1 given, we have a total of 24 animals which are grouped into
12 mating pairs which is why it's the most appropriate choice.
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