Answer:
An organism that uses organic carbon for its carbon needs and sunlight for its energy needs would be called a photoautotroph.
Step-by-step explanation:
Photoautotrophs are a type of autotroph, which are organisms that can produce their own organic compounds from inorganic substances, such as carbon dioxide and water, using energy from sunlight or other sources. Photoautotrophs use sunlight to drive the process of photosynthesis, which converts carbon dioxide and water into organic compounds, such as glucose, and releases oxygen as a byproduct. This process requires light energy, which is absorbed by pigments, such as chlorophyll, that are located in specialized organelles called chloroplasts.
In contrast, heterotrophs are organisms that cannot produce their own organic compounds and must obtain them from other organisms. Chemoheterotrophs obtain energy by breaking down organic compounds, such as glucose or other carbohydrates, using cellular respiration or fermentation. Photoheterotrophs obtain energy from sunlight but cannot fix carbon dioxide and must obtain organic compounds from other organisms or from the environment. Halotrophs are organisms that can grow in environments with high salt concentrations.
'Therefore, a photoautotroph is the most appropriate term to describe an organism that uses organic carbon for its carbon needs and sunlight for its energy needs.