economic accumulation of petroleum only occurs in which type of geological basins?\nmagma\nmolten\nsedimentar…

Brief Explanations:

Petroleum accumulates in sedimentary basins. These basins are formed by the deposition of sediments over time, and they provide the right conditions for the formation and trapping of petroleum. Magma, molten, and volcanic refer to igneous - related processes and are not the geological basins where economic petroleum accumulations occur.

Answer:

sedimentary