Paleontologists are able to apply evidence from fossils to reconstruct the habitats of ancient extinct animals, such as dinosaurs. Which type of observation or measurement of the fossils provides the most useful evidence for this task?

A. DNA analysis, which reveal evolutionary relationships with modern animals
B. muscle tissue analysis, which reveal how muscles were used
C. measurements of radioactivity, which show the age of the fossil
D. observations of bone and joint structure, which show how an animal moved