In 1958, the carbon dioxide level measured in Earth's atmosphere was about 315 parts per million (ppm). In 2000, the carbon dioxide level in the atmosphere had increased to about 368 ppm. What was the average annual increase in carbon dioxide in the atmosphere between 1958 and 2000 measured in ppm? What possible explanation is there for the increase in atmospheric carbon dioxide?

i'm assuming that the correct answer is indeed the first one/ "a"..

that tool would be a compass

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.