We can actually deduce here that the societal change the speaker is referring to in this excerpt is: Technology has become a more prominent part of our lives.
Who is a speaker?
A speaker is actually known to be an individual who narrates or recounts an event. A speaker can also be seen as a narrator in a story who helps readers to understand the plot of a story.
This is the excerpt the question above is referring to:
"We were born in flight , in motion in front of screens and devices meant to make life easier."
Thus, we see that option D is correct answer which shows the societal change is the speaker referring to.
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