In the carbon cycle, carbon molecules are exchanged between the natural carbon reservoirs of rocks, soil, plants, fossil fuels, and the ocean. Which of the following is NOT an important exchange between two reservoirs?
А
from the atmosphere to the hydrosphere, in which gaseous carbon dioxide dissolves into the oceans
B
from the atmosphere to fossil fuels, in which gaseous carbon dioxide forms minerals at Earth's surface
с
from the hydrosphere to fossil fuels, in which ocean sediments are compressed into rock on the ocean floor
from fossil fuels to the atmosphere, in which emissions from cars and industry release gaseous carbon dioxide

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.

Leaves specifically the gas exchange between plants and the environment. while plants undergo photosynthesis, they also partake in cellular respiration. respiration is the process that happens in the leaves of plants.