Where do the atoms in the organic molecules in the tree come from?

answer: the mass of a tree is primarily carbon. the carbon comes from carbon dioxide used during photosynthesis. during photosynthesis, plants convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.

explanation:

italy's population growth rate is almost at zero, the national statistics agency, istat, said on monday, mainly due to a dwindling birth rate.

maritime tropical may be your answer.