Which of the following statements is true? Choose one:

A. Tidewater glaciers are glaciers that experience movement due to the tides.

B. Icebergs, by definition, are free-floating chunks of ice that are at least 6 m above water and at least 15 m long.

C. Ice is denser than water.

D. Roughly half of a floating block of ice lies below the surface of the water.

Option B is correct.

Explanation:

An iceberg is a floating piece of ice that broke off from a glacier and floats freely on the open sea.

Above the surface, the size can go between 1 to 75 meters tall, and they weight about 100.000 - 200.000 metric tons.

The tallest iceberg that we have a record of, was 168 meters tall, and it was located in the North Atlantic.