Within an HTML5 <video> element, what is the primary purpose of supplying multiple <source> tags?

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A It allows the browser to play all the videos at the same time in a grid layout.
B It provides fallback media file options in different formats so browsers can play whichever one they natively support.
C It splits the audio track from the video track for security isolation.
D It provides different language translations automatically without closed captions.

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Answer: B. It provides fallback media file options in different formats so browsers can play whichever one they natively support.

Answer: B) It provides fallback media file options in different formats so browsers can play whichever one they natively support.
Explanation: Different browsers support different media containers and codecs (such as MP4/H.264, WebM/VP9, or Ogg). By stacking multiple <source> elements, the browser evaluates them from top to bottom and automatically executes the first compatible format it recognizes.

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Within an HTML5 <video> element, what is the primary purpose of supplying multiple <source> tags?

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