What does a speech-to-text system do?

Correct answer: Converts spoken sound into written or digital text

Speech-to-text, also called automatic speech recognition, processes an audio signal, detects spoken words, and produces written or digital text. Therefore, option A is correct because it describes conversion from speech to text. Option B is the reverse process, text-to-speech. Option C belongs to computer vision, while option D is a text-editing or language-processing task.