I think it is eutrophication
A .gamma
Because composed of photons, which have neither mass nor electric charge and, as a result, penetrates much further through matter than either alpha or beta radiation.
True. The thing about chemical changes is that it is not easily reversible and new substances having different chemical properties are formed. For example; burning of wood to ashes.
Answer: A. Wladimir Koppen.
I hope that this helps you and good luck!!
~Sara
Closer is bigger................