What kinds of information about a species can you not obtain when all you must work with is a fossilized skeleton?

The correct answer is - social behavior of the species can not be obtain from the fossilized skeleton.

Explanation:

Social behavior is the interactions between individual animals of population or the species. The aggregation, parental behavior, conflicts or mating all are the part of the social interaction of an individual species.

Fossilized skeletons can give idea about the anatomy, morphology, phylogeny and many other aspects, However it is not possible to get information related to the social behavior of the species from the fossilized skeleton.

Thus, the correct answer is - social behavior of the species can not be obtain from the fossilized skeleton.