Answer:
Cambrian explosion
Explanation:
Cambrian explosion is a geological event that happened during the Cambrian age (541 million years ago). In this period, most of the animal phyla (including marine) appeared and their geological record is preserved in the form of fossils. The period lasted for 13-25 million years. Before this period, the organisms were very simple. They were mostly unicellular in nature and were living in the form of colonies.
The remaining three options are incorrect. They are tectonic events that reflect movement of continents in different geological times. None of them resulted in the diversification of (marine) animal phyla.
The answer is; D
The boat acts a particle in the wave hence moves with the waves. Since it sits at surface of the crest or trough of the wave, it rises as high as the crest of the wave amplitude and falls as low as the surface of the trough. The boat moves in a wave-like motion as it is undulates with the crest and trough.
