Fact 1: Erosion causes a river to become deeper and wider. Fact 2: Erosion alters the constituents carried by water. Given the two facts above, deeper and wider rivers alter the constituents carried by what?

(1). rivers.
(2). atmosphere.
(3). mussels.
(4). clouds.
(5). salmon.
(6). moisture.
(7). water.
(8). Frogs..
Answer:
(7).