Read the following passage, and then answer the questions in bold:
He did extraordinarily well in the war. He was a captain
before he went to the front, and following the Argonne battles he got his majority and the command of the divisional
machine-guns. After the Armistice he tried frantically to
get home, but some complication or misunderstanding sent 5
him to Oxford instead. He was worried now — there was a
quality of nervous despair in Daisy’s letters. She didn’t see why
he couldn’t come. She was feeling the pressure of the world
outside, and she wanted to see him and feel his presence
beside her and be reassured that she was doing the right thing 10
after all.
For Daisy was young and her artificial world was redolent
of orchids and pleasant, cheerful snobbery and orchestras
which set the rhythm of the year, summing up the sadness and
suggestiveness of life in new tunes. All night the saxophones 15
wailed the hopeless comment of the Beale Street Blues while
a hundred pairs of golden and silver slippers shuffled the shining dust. At the gray tea hour there were always rooms that
throbbed incessantly with this low, sweet fever, while fresh
faces drifted here and there like rose petals blown by the sad 20
horns around the floor.
Through this twilight universe Daisy began to move
again with the season; suddenly she was again keeping half a
dozen dates a day with half a dozen men, and drowsing asleep
at dawn with the beads and chiffon of an evening dress tan- 25
gled among dying orchids on the floor beside her bed. And
all the time something within her was crying for a decision.

She wanted her life shaped now, immediately — and the
decision must be made by some force — of love, of money,
of unquestionable practicality — that was close at hand. 30
That force took shape in the middle of spring with the
arrival of Tom Buchanan. There was a wholesome bulkiness
about his person and his position, and Daisy was flattered.
Doubtless there was a certain struggle and a certain relief. The
letter reached Gatsby while he was still at Oxford. 35

What literary term is present in lines 20-21?
Name the term and present the evidence to support it.