Carbon is transferred from seawater to atmosphere through the process of

diffusion
excretion
photosynthesis
respiration

The correct answer is option - diffusion.

Explanation:

The interconversion or exchange of the carbon among biosphere, hydrosphere, geosphere, pedosphere, and atmosphere. It is a biochemical reaction that involves the movement of the carbon molecules. Carbon is the major component of all biological compounds and minerals.

The transfer of the carbon from seawater to the atmosphere through the process of diffusion. Diffusion is the process in which dissolved carbon of seawater or the oceans are carried up by the air that flow over the sea and it takes up some of the carbon with it.

Thus, the correct answer is option - diffusion.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.