The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The circumstance that prevented the United States from destroying the Shokaku was that it was the premier Japanese ship in the Pacific theater of World War II, and was a difficult target to hit.
During the Battle of the Philippine Sea, scouts from the USS Lexington found the Japanese ships and attacked them with torpedo planes. Another US Navy ship, the USS Yukon also help in the attack with airplanes. However, the torpedos did not hit the Shokaku. The American aircraft carriers and the torpedo systems had problems.
The attack that partially functioned was the airplane attack that hit and damaged the Japanese ship.
The circumstance that prevented the United States from destroying the shikaku was that it was a difficult target for the US.
Initially, USS Lexington attacked a Japanese ship in the Philippine Sea. Afterward, a US Navy ship also attacked the ship with airplanes.
Therefore, US aircrafts having torpedos were not potential enough to destroy shokaku due to defect in it.
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