Q: Oil is found in the porous rock layer and trapped by the what?


Read this paragraph and choose the correct option from the provided answers:

Oil (red) is found in the porous rock layer (yellow) and trapped by the impermeable layer (brown). The folded structure has allowed the oil to pool so a well can be drilled into the reservoir.

 Choices:

- \

- crystalline layer

- mantle

- impermeable layer


A:
impermeable layer