Sculptures and cave paintings were a development of the Paleolithic period.
The answer is hiccuping. A hiccup is called an involuntary contraction of the diaphragm that can be repeated several times in a minute. The hiccup then would be an involuntary action and can be use in the technique like love, well and Peggy.
I'm pretty sure the answer is D because it seems like the most logical statement that could be made by an explorer.
An ethnomusicalologist studies Javanese Gamelan music.