Which of these is a body fossil? {a}. dinosaur footprint {b}. shrimp burrow {c}. dinosaur bone {d}. an ornithopod track

{c}. Dinosaur Bone
Fossils are remains from a certain organism,or trace of any once-living thing from a past geological age. 
If it is check all that apply, {b}. Shrimp Burrow might be one of the answers too, but until then, stick with C. 

From our previous experiment, we examined how many drops a penny can hold - and place drops of salt water on the penny after recording 5 trials each, take the average of each solution.