Answer :
The option that best describes the impact of urbanization on carbon cycle is : ( B ) Decaying organic matter increases in landfills, which increases the amount of carbon dioxide in the atmosphere.
Effects of the organic matter on the environment
When organic matter decays, this leads to an increase in landfills and as the landfills increases there is also a corresponding increase in the amount in the carbon dioxide which will be released into the atmosphere.Also an increase in the population of an area does not result in the increase of carbon dioxide in the atmosphere.
Hence we can conclude that The option that best describes the impact of urbanization on carbon cycle is Decaying organic matter increases in landfills, which increases the amount of carbon dioxide in the atmosphere.
Learn more about effect of organic matter : https://brainly.com/question/4618039
#SPJ1