Answer:
B. Concave shape of Wave Rock
Step-by-step explanation:
Wave Rock is a natural rock formation located east of the small town of Hyden, Australia. At 14m high and 110m long, the face of Wave Rock seems ready to hit a prehistoric navigation, now frozen in time. It is believed to have formed more than 2700 million years ago, Wave Rock is part of the north face of Hyden Rock. The waveform is formed by the gradual erosion of the softer rock under the upper edge over many centuries, thus showing evidence of the evolution of the earth.