From "The Lady of Shalott" by Alfred, Lord Tennyson

In the stormy east-wind straining,
The pale-yellow woods were waning,
The broad stream in his banks complaining,
Heavily the low sky raining
Over tower'd Camelot;
Down she came and found a boat
Beneath a willow left afloat,
And round about the prow she wrote
The Lady of Shalott.

And down the river's dim expanse—
Like some bold seër in a trance,
Seeing all his own mischance—
With a glassy countenance
Did she look to Camelot.
And at the closing of the day
She loosed the chain, and down she lay;
The broad stream bore her far away,
The Lady of Shalott.

Lying, robed in snowy white
That loosely flew to left and right—
The leaves upon her falling light—
Thro' the noises of the night
She floated down to Camelot:
And as the boat-head wound along
The willowy hills and fields among,
They heard her singing her last song,
The Lady of Shalott.

A painting of a young woman sitting in a small boat on a waterway in the woods. Stairs have led down to this place. A glimpse of sky shows it to be at sunset, and it is cloudy. The womans face is distraught, her eyes downcast and her lips parted. She wears white, and her red hair is ragged and blowing. She holds a slender chain in her hand. There is a tapestry draping from the boats side, and there is indistinct writing on the prow of the boat.
Public Domain

Based on the details provided in the poem, the painting most likely portrays the

reason for the lady’s journey
beginning of the lady’s journey
destination of the lady’s journey
end of the lady’s journey