What explains the origin of organic molecules on Earth? 

A)  formation of inorganic molecules around hydrothermal vents in the ocean floor 
B)  formation of multicellular eukaryotes from inorganic molecules in the seas 
C)  formation of the first protocells from inorganic molecules on land 
D)  formation of organic molecules from inorganic molecules and an energy source

Inorganic Molecules

Chemical compounds lacking a carbon-based structure, excluding carbonates and bicarbonates, that are typically found in non-living matter.

Hydrothermal Vents

Openings in the ocean floor that release heated water rich in minerals, supporting unique ecosystems based on chemosynthesis rather than photosynthesis.

Organic Molecules

Complex molecules that contain carbon and are typically found in living organisms, essential for life processes.