Final answer:
NPR's website represents convergence in mass communication, integrating various media forms into one digital platform accessible through devices like smartphones. Therefore the correct answer is Option 1.
Step-by-step explanation:
The phenomenon in mass communication that NPR's website exemplifies by presenting photos, video, audio, and written stories along with streaming copies and transcripts of past aired stories is known as convergence. This cross-platform media integration allows content that was traditionally separated by medium, like radio and print, to come together on a single platform. Convergence occurs when multiple forms of media are accessed through digital devices like smartphones and computers, merging them into an interconnected digital media space.