@Pewdiepug they are foreign organisms that can carry further foreign organisms. There is a chance there's an insect or eggs or such burrowed inside the apple. Australia, being a geographically isolated country (therefore with a very vulnerable ecosystem) is terrified of foreign biological instrusions. The apple in itself is not the danger, but the apple may pose as a *host* to dangers.
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@Pewdiepug they are foreign organisms that can carry further foreign organisms. There is a chance there's an insect or eggs or such burrowed inside the apple. Australia, being a geographically isolated country (therefore with a very vulnerable ecosystem) is terrified of foreign biological instrusions. The apple in itself is not the danger, but the apple may pose as a *host* to dangers.