Three traits that the scientists can figure out relatively easily from a complete fossil of an organism is its bone structure, muscle structure, and how it was feeding.
A complete fossil can give the scientist a lot of answers about certain organism. For starters, it will present to them the complete bone structure. The bone structure gives the basis for the muscle structure, thus provide the appearance of the organism. Also, by having the organisms full dentition, as well as complete fossil, it can very easily be determined what was the diet of it and how it fed.
