Blue jays (*Cyanocitta cristata*) play a crucial role in the expansion of oak forests across North America. During the autumn months, these birds gather thousands of acorns, burying them in various underground caches to secure food for the winter. While blue jays retrieve many of these stored acorns, they inevitably leave a significant portion recovery-free. These forgotten acorns, buried in favorable soil conditions far from the parent trees, frequently germinate and grow into new oak trees. Consequently, the caching behavior of blue jays is essential for the dispersal and regeneration of oak populations.
Which choice best states the main idea of the text?
- Blue jays help regenerate and expand oak forests by burying acorns that they do not retrieve.Cevap
- BBirds in North American forests play a vital role in maintaining the health of all native plant species.
- CBlue jays rely on a diet consisting entirely of acorns during the winter months.
- DOak trees have evolved to produce acorns that are deliberately difficult for blue jays to retrieve.
Cevap
Blue jays help regenerate and expand oak forests by burying acorns that they do not retrieve.
The correct answer accurately states the main idea of the text. The passage describes how blue jays cache acorns in the ground for the winter, fail to retrieve all of them, and thereby facilitate the germination and growth of new oak trees, which regenerates the oak forest.
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