Rhetorical Strategy Analysis of Technology Talk

In the following excerpt from a TED Talk focused on the impact of technology on human interaction, the speaker argues:

“While technology promises connection, it often delivers isolation. We find ourselves surrounded by our devices, yet feel more alone than ever. To reclaim our humanity, we must consciously put down our screens and engage in real conversations.”

This speaker's utilization of rhetorical strategies serves to highlight the contrast between perceived connectivity and real social isolation. Based on the excerpt, which rhetorical strategy is primarily at work in conveying the speaker's argument?