Answer:
limestone is said to be an example of natures recycling because it is made from the shells and bones of dead oceanic creatures. sense the shells are changed from one form to another it is considered recycling.
Explanation:
C.
The door is made of glass, which is an example of non-porous surface.
Ninhydrin is one of the most widely used reagents for chemical development of fingerprints on porous surfaces.
The correct answer would be C. Hope this helps.