Q: Fact 1: Asandbar is formed by water moving sediment downstream. Fact 2: Bare sandbars are the ideal spots for new stands of cottonwood. Given the two facts above, what is required for the ideal habitat for new stands of cottonwood?

Pick from:
(I) sunlight
(II) nutrients
(III) warmth
(IV) Sediment
(V) Black tar
(VI) Hot magma
(VII) trees
(VIII) Chainsaws
A:
(IV)