The correct answer is: D. tragedy of the commons theory.
The tragedy of the commons theory explains situation in a system where resources are shared and suddenly the individual users start to act independently. Individual users (in this case world countries) start to act according to their own self-interest behave contrary to the common good of all other users (e.g. fishing companies) by depleting or spoiling that resource (fishes and other marine organisms) through their collective action.
Explanation:
One of the main causes of genetic erosion is the replacement of local varieties by modern varieties. Other causes include environmental degradation, urbanization and land clearing through deforestation and bush fires.
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