Question

Plants use carbon dioxide from the air and are therefore called _____.

a. consumers

b. producers

c. decomposer

d. carbon fixers

Short answer

Plants use carbon dioxide from the air and are therefore called as producers

Step-by-step solution

Explanation

The organisms which synthesize their own food by using energy and inorganic molecules are referred to as producers. The consumers are those who obtain energy by consuming producers, while decomposers decompose the organic wastes and dead remains of the organism to convert them into inorganic molecules, which are released back to the environment. While autotrophs and heterotrophs are the carbon fixers.

Final answer

Hence, the correct option is 'b'.