Recent technological advancement in manned and unmanned undersea vehicles…
2025
Recent technological advancement in manned and unmanned undersea vehicles overcome some of the limitations of divers equipment. Without a vehicle, divers often became sluggish and their mental concentration was limited. Because of undersea pressure that affected their minds, concentration among divers was difficult or impossible. But today, most oceanographers make observations by means of instruments that are lowered into the ocean or from samples taken from the water. Direct observations of the ocean floor are made not only by the divers but also by deep-diving submarines. Some of these submarines can dive to depths of more than several miles and cruise at depths of 15 thousand feet. Radio-equipped buoys can be operated by remote control in order to transmit information back to land-based laboratories including data about water temperature, currents, and weather. Some of mankind’s most serious problems, especially those concerning energy and food may be solved with the help of observations made possible by these undersea vehicles.
Divers have had problems in concentrating underwater because:
- A.
they did not think clearly
- B.
the pressure affected their minds
- C.
of distractions while diving
- D.
the vehicles they used have not been perfected
Attempted by 4 students.
Show answer & explanation
Correct answer: B
Answer: the pressure affected their minds
Explanation:
The passage states, "Because of undersea pressure that affected their minds, concentration among divers was difficult or impossible." This sentence directly identifies undersea pressure affecting divers' minds as the reason for their difficulty concentrating.
Locate the explicit cause in the passage: undersea pressure affected divers' minds.
Match that cause to the option that mirrors the same idea: the pressure affected their minds.
Other choices either restate the effect vaguely, introduce unsupported reasons like distractions, or mention unrelated topics such as vehicle perfection.