Answer:
Because a light or the sun shines on that object.
Explanation:
“Shiny” in physics means reflection of light. Reflection is the bouncing back of light to its original medium or object in different direction.
Light reflects on specular materials. Specular materials are materials with glossy surfaces and reflects like a mirror.
Examples of this materials are mirror, water, glasses, precious stones and metals like gold, silver, stainless etc.
Lights reflecting on these materials are visible and the greater the amount of light the greater the effect of reflection on these materials which means the effect of brightness of reflection depends on the light source.
That is why the reflection of light on the material caught the attention of the girls because the light source as well is great.
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