Question

when is lossy compression used?
when you do not want to lose any data
when you need to open the file in adobe photoshop
when you want to reduce data size for storing and sharing content
when you need to access the metadata for an image

Explanation:

Lossy compression is used to reduce file size by discarding some data (with an acceptable quality loss for storage/transmission). Let's analyze each option:

• "when you do not want to lose any data" is for lossless compression, so incorrect.
• "when you need to open the file in Adobe Photoshop" – Photoshop supports various formats, not specific to lossy compression use case.
• "when you need to access the metadata for an image" – Metadata access isn't related to lossy compression's purpose.
• "when you want to reduce data size for storing and sharing content" matches lossy compression's goal (trading some data for smaller size, suitable for storage/sharing like images/videos).

Answer:

when you want to reduce data size for storing and sharing content