An observation is something you saw happen whereas an inference is something you think will happen. You can guess that the water will fall through a static filled comb, but you observed the water moved away from the comb instead. (I saw this happen and I thought it was so cool)
Genetic fingerprinting is a tool used in analyzing body tissues or fluids, and in identifying a person.
hope this helped <span />
B is the correct answer to your question
