Final answer:
Chemosynthetic organisms are autotrophs that use inorganic molecules as an energy source to synthesize their own food through chemosynthesis.
Step-by-step explanation:
Chemosynthetic organisms are autotrophs capable of synthesizing their own food using inorganic molecules as an energy source. Unlike photosynthetic autotrophs that use sunlight, chemoautotrophs use chemical energy to produce organic molecules through a process called chemosynthesis. These organisms are critical for ecosystems as they occupy the producer trophic level, providing energy for other living organisms.