Which type of organism is characterized by the ability to synthesize its own food?

The correct choice is characterized by organisms that can produce their own food through processes like photosynthesis or chemosynthesis. These organisms typically include plants, algae, and some bacteria. They utilize sunlight or chemical energy to convert inorganic substances into organic molecules, which serve as the foundation for energy transfer in ecosystems.

In contrast, consumers rely on other organisms for their nutritional needs, while decomposers break down organic matter, returning nutrients to the soil but not synthesizing their own food. The term 'interceptor' is not commonly used in the context of describing ecological roles, which distinguishes the proper classification of producers. Therefore, the ability to synthesize food independently is a defining feature of producers, making this option the correct response.