Question

at the end, a big chunk can split off and make an iceberg. on page 6, the text suggests that glaciers are small and soft. glaciers are made of rocks. icebergs come from glaciers.

Explanation:

The text mentions that at the end, a big chunk splits off from something (presumably a glacier) to make an ice - berg. This implies that icebergs come from glaciers. Glaciers are large masses of ice, not small and soft, and they are not made of rocks.

Answer:

icebergs come from glaciers.