A student is writing a research paper. Read the portion of the paper below. Then select the sentence that should be removed to keep a consistent style and tone.
Glaciers happen when a big mess of snow hangs around all year. Instead of melting, this snow gradually turns
to ice. Once snow and ice is thick enough to form a glacier, the whole mass starts to move slowly under the
pressure of its own weight. When glaciers move, they create unique features in the landscape, such as U-
shaped valleys and pyramid-shaped mountain peaks