In "My Last Duchess" by Robert Browning, which technique is not used by Browning to create a sense of dramatic action?

In the poem "My Last Dutches", Rober Browning uses different techniques or a combination of several techniques such as listed below:

1. rhyme scheme, Browning preferred the simple one.

2. Enjambment. Constructing a sentence without a pause.

3. Caesura. Using metrical foot in breaking between words.