My guess is A. depth increases because I know that the deeper you go in the ocean, the higher the water pressure is (which makes it difficult to explore).
<span>Infrared red waves have a shorter wavelength than
</span>A Ultra violet
Time = 7200 s. 3600 s = 1hour.
7200s = 7200 / 3600 = 2 hours.
Speed = Distance / time = 150 km / 2 hours = 75 km/h
Answer: Exist naturally
Explanation: Hope This Helps ..!