Question

which line supports the idea that the speaker of \the morns are meeker than they were\ wishes to take part in natures seasonal changes?
the maple wears a gayer scarf—
the field a scarlet gown—
lest i should be old fashioned
ill put a trinket on.

Explanation:

The first two lines describe nature's seasonal changes (maple's colorful leaves, field's red hue). The last two lines show the speaker wanting to match these changes: "Lest I should be old fashioned / I'll put a trinket on" reveals their desire to participate in the seasonal shift by altering their own appearance to align with nature's transformation.

Answer:

Lest I should be old fashioned
I'll put a trinket on.