Question

which recording system relies on a hard drive to store its content? dvr streaming vcr dvd

Explanation:

A DVR (Digital Video Recorder) uses a hard - drive to record and store video content. Streaming typically involves accessing content over a network without local hard - drive storage for the main content (though some buffering may occur). A VCR (Video Cassette Recorder) uses tapes for storage. A DVD is a disc - based storage medium, not a hard - drive.

Answer:

A. DVR