To accurately answer this question about the melodic techniques used in Beethoven's Fifth Symphony, it's important to consider the characteristics of the piece.
The most defining feature of the excerpt is the recognizable four-note motif, which is repeated and varied throughout the symphony. This motif is notable for its rhythmic intensity and is marked by a sense of repetition.
Thus, the best response regarding the melodic technique that describes the excerpt from Beethoven’s Fifth Symphony would be repetition.