。
She arranged the plates on the table.
Literal
She [topic-は] table [on-に] plates [object-を] arranged.
並べる ('arrange in a row, line up') adds an orderly-arrangement nuance over the neutral 置く ('place'). The image is plates being lined up methodically rather than just put down. Note the bare テーブルに rather than テーブルの上に — the location-target に on テーブル alone is enough; 'on top of' is implied. Both options are common, with the more elaborate の上に more common in writing or when emphasizing position is needed.