Biology

For A: Petrified wood forms when wood is replaced by minerals over time, a process that typically preserves hard tissues, not soft-bodied organisms. Therefore, it is less likely to preserve soft-bodied organisms.
Fossils in tar pits:

For B: Fossils in tar pits are the most likely to preserve soft-bodied organisms. Tar pits, such as the La Brea Tar Pits in California, have preserved both hard and soft tissues. The tar acts as a preservative by trapping organisms and protecting them from decay, which makes it a good environment for the preservation of soft-bodied organisms (like insects, amphibians, and small mammals).
Fossils in limestone:

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