Answer:
a. As CO2 increases, the temperature also increases.
Step-by-step explanation:
Carbon dioxide (CO2) is an atmospheric molecule produced naturally via respiration or artificially via burning of fossil fuels. CO2, as rightly stated in this question, has been referred to as a greenhouse gas because it acts to trap the sun’s heat on Earth.
Logically, an increase in the amount of greenhouse gas like CO2 released into the atmosphere means an increase in the greenhouse effect or global warming (increase in global air temperature). However, according to the GRAPHICAL REPRESENTATION in this question, an increase in the ppm concentration of CO2 led to an increase in the temperature (°F) of the globe over the years.
As depicted on the graph, at a CO2 concentration of 390ppm, the relative temperature was at over 1°F.