Jawaban:

1.They have also been observed chasing prey after a missed attack. Prey is usually attacked at the surface. Shark attacks occur most often in the morning, within two hours of sunrise, when visibility is poor.

2.I don't understand why 'obsessive' has a negative connotation, I'm an obsessive and I like it," says Boyan Slat. "I get an idea and I stick to it."

This idea came to him at the age of 16, in the summer of 2011, when diving in Greece. "I saw more plastic bags than fish," says Slat. He was shocked, and even more shocked that there was no apparent solution. "Everyone said to me: 'Oh there's nothing you can do about plastic once it gets into the oceans,' and I wondered whether that was true."

3.This arrangement enables octopuses to complete tasks with their arms more quickly and effectively.

Moreover, while each arm is capable of acting independently - able to taste, touch and move without direction - the centralised brain is also able to exert top-down control.

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