Question

And in my humorous way ,I added (as a trifling jest)'
identify the figure of speech

Answer 1

The figure of speech is onomatopoeia

Answer 2

In the poem ‘The height of the Ridiculous’ written by Oliver Wendell Holmes, the lines “And in my humorous way, I added (as a trifling jest)” contain the figure of speech of onomatopoeia.

The poem in itself has been written in quite a jolly mood.

The usage of his words reflect his intentions which make it all the more fun.