What security feature appears and disappears and is usually used to protect a photo?

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Multiple Choice

What security feature appears and disappears and is usually used to protect a photo?

Explanation:
Holograms are designed to respond to light and viewing angle, so the image seems to appear or disappear as you tilt or move the item. This angle-dependent effect makes the security feature highly effective for protecting a photo on official documents or cards, because counterfeiters can’t easily reproduce the shifting image. Watermarks are visible under light but don’t change with angle in the same way, microprint requires close inspection to read tiny text, and UV stripes are only visible under ultraviolet light.

Holograms are designed to respond to light and viewing angle, so the image seems to appear or disappear as you tilt or move the item. This angle-dependent effect makes the security feature highly effective for protecting a photo on official documents or cards, because counterfeiters can’t easily reproduce the shifting image. Watermarks are visible under light but don’t change with angle in the same way, microprint requires close inspection to read tiny text, and UV stripes are only visible under ultraviolet light.

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