The answer is phosphate for sure!
Answer:The answer is C
Explanation: protection and vitamin generation
protection in the form of melanin to absorb UV light
vitamin generation in the synthesis of vitamin D from cholesterol
In the stone age people start to carve pictures of animals and plants on the wall, Another answer may be early civilization Where Natives would sculpt and carve statues as idol's
The answer to this is the Ecosystem.
Hope I helped! :)