The answer is B, he is frightened by the zebra’s presence. You can tell because baboon said the name made him jump a little as if he was in fear of zebra. Hope this helps!
The answer in the first sentence above is hypothesis because it is defined as having to state a prediction or conjecture in regards about an experiment whereas the second sentence' answer is experimental question because researchers tend to state what they plan to do in regards of their investigation and they do not apply any predictions in the experiment.
Answer:
I believe it's A. a message designed to induce fear, or increase the anxiety of, a receiver
