Earth is made up of four systems: atmosphere, hydrosphere, geosphere, and blosphere. While each sphere covers a different
component of the planet, they are closely related to each other and interact often. An event in one sphere can cause dramatic
changes in another. Carbon is an element with a critical role in all four spheres. A student draws a model of the four spheres in
relation to the carbon cycle.
Carbon Cycle
Atmosphere
Cellular
respiration
Photosynthesis
CO2
V Hydrosphere
Biosphere
Energy
Ocean
Oil
Fossils
Geosphere
Shell
Which sphere, regarding carbon would be most immediately affected by a decrease in sunlight?
A Atmosphere
OB. Biosphere
O C. Geosphere

Atmosphere would be most immediately affected by a decrease in sunlight because sunlight is responsible for the photosynthesis in plants. if sunlight decreases, the photosynthesis reaction is also decreases in plants and less carbondioxide gas is used by the plant from atmosphere for making their food so we can say that atmosphere is greatly affected by the decrease in sunlight.