Answer:
Nature provides signs of autumn.
Explanation:
Emily Dickinson's poem "Autumn" is a short poem of two stanzas where the poet talks of the season of autumn. The eight lines of the poem show or express the visible signs that suggest autumn is here.
The signs such as "<em>nuts getting brown</em>", plump berries, scarlet fields, etc. are all suggestive of the autumn season. And in painting the image of the mellowed scene of autumn, the speaker/poet expresses the central idea of nature providing signs of the autumn season.
Thus, the correct answer is the third option.
