It can be said that some of the carbon atoms in our amino acids and proteins may have been released into the atmosphere by animals across the globe. summarize the process by which carbon can be cycled through the ecosystem from exhale to ingestion.

The carbon cycle is the process in which carbon travels from the atmosphere into organisms and the Earth and then back into the atmosphere. Plants take carbon dioxide from the air and use it to make food. Animals then eat the food and carbon is stored in their bodies or released as CO2 through respiration.

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Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.