Which of these phenomena was probably NOT a source of large organic molecules, the building blocks of life, on the early Earth?

Question

Quizplus · Accepted Answer

Volcanic eruptions, while contributing to the early Earth's atmosphere and possibly providing energy sources for the synthesis of organic molecules, are not directly associated with the delivery or formation of large organic molecules in the same way as comets, meteorites, or lightning flashes in the early terrestrial atmosphere. These latter phenomena are more directly linked to theories explaining the origin of life's building blocks, such as the delivery of organic compounds from space (comets and meteorites) or the synthesis of organic molecules from simpler compounds through energy inputs (lightning flashes).

Which of These Phenomena Was Probably NOT a Source of Large