The green box in the model represents organisms that remove carbon dioxide from the atmosphere to recycle it. Which BEST describes these organisms?
a
producers that carry out photosynthesis to make carbon-rich sugars
b
bacteria that combine carbon dioxide with nitrogen to make nutrients
c
fungi that break down oxygen and release carbon dioxide in exchange
d
consumers that make energy by taking in carbon dioxide when they inhale
a
producers that carry out photosynthesis to make carbon-rich sugars