pick from the following.
(1). soils.
(2). tectonic plates.
(3). magnets.
(4). water.
(5). rivers.
(6). wind.
(7). loose soil.
(8). erosion.

Fact 1: Sediment is formed by weathering. Fact 2: All sediments originate from the weathering and erosion of older rocks. Given the two facts above, what causes sediment to form?
Answer:
(8).