A digital audio recording is called a podcast which is usually produced in a series and can be downloaded for learning. Thus, (a) 'podcast' is the correct choice.
A podcast refers to a series of digital files, generally either digital audio or video that is released episodically and made available for download by means of the internet. Simply, a podcast is a program or file provided in digital format for download over the Internet. For example, a periodic series of digital video or audio files that a user can download to their personal device to listen to at a time that suits them.
While the use of the rest of the trems is as follows:
- Video clips refer to short videos.
- Raster is described as digital images.
- Audacity is software to record and edit audio.
You can learn more about Podcasts at
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