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Hi my name is Chris Reid, and I'm here to explain Natural Selection. Natural Selection is a way that nature chooses the best of a group of animals to stay alive and reproduce.
When two animals reproduce Genetic Variation can differentiate the offspring's genes to make them look and act differently.
Not all animals live up to their full potential, and can die early before getting to share their genes with another's to produce their own offspring.
In this case the only survivor was a spider pig.
Then the spider pig reproduces, then mixes the spider pig gene into the pool of genes, and eventually it becomes a genetic basis, this is called heredity.
End result, the normal pigs all die off, due to their inability to reproduce with the spider pigs, and the spider pigs become the dominant pigs of the gene pool.
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