Taxonomical aids used as quick referral system include collections that help in easy identification and comparison, such as botanical gardens, zoological parks, herbaria, and museums.

Now check options:

Herbarium and books incorrect (books are not a taxonomical aid)

Botanical garden and zoological park correct (both are living reference collections)

Zoological park and herbarium correct (both are valid aids, but not the standard paired “quick living reference system” in most texts)

Biological museum and zoological park correct (both are aids, but less commonly cited as the main quick referral pair)

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