What abiotic asecpts of an ecosystem can be effected by biotic ascepts? A: diseased plants from fungi
B: extreme heat evaporating a stream
C: heavy rain adding to soil erosion
D: animals digging in the ground adding to soil erosion

The answer is solid copper 

Ch3cooh i think this is the answer

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.