The answer is I. 25 meters.
I think the best answer is B. Chinese culture influenced Japan in the areas of religion, writing, and technology. China, being in close contact with Japan even before, had many influences in Japan. They imported a very big rang of ideas, techniques of production and institutional models from China. Through these, new rice growing techniques and handicraft production were developed by Japanese as early as the Yamato period.
Roads, bridges, mass transit systems, airports and sea ports, and water
There's actually an entire documentary made about this certain fish, its name is Parrot Fish.
The reason for its name is because it has a beak, which it uses to bite and eat through coral.
And at the end of the day, when the fishes poop, it turns into sand.
For example, one 2010 study in Marine Biology found that large parrotfish in Hawaii can churn out 840 pounds of eroded coral—i.e. white sand—per year. A single giant humphead parrotfish can produce 11,000 pounds of sand per year.
hope this helps!
B. The curtains on the windows of a bedroom.
The rest of the choices are not man-made which would not be infrastructure.
