The correct answer is b. convert organic material to inorganic forms.
Explanation: Decomposers break down complex organic compounds found in dead organisms into simpler inorganic nutrients.
Why other options are incorrect:
a. convert inorganic material to simpler forms: Decomposers break down complex organic matter, not inorganic materials. Inorganic materials are simpler by definition.
c. convert inorganic materials into organic compounds: Producers, like plants through photosynthesis, convert inorganic materials into organic compounds. Decomposers do the opposite process.
d. do not breakdown organic compounds: Decomposers are defined by their ability to break down organic compounds.