Answer the following question: Fact 1: Avalley is formed by a river flowing. Fact 2: Rivers cause erosion by transporting weathered rock and soil downstream. Given the two facts above, what are created through erosion?

OPT: a). kalenchoes; b). Roads; c). Valleys; d). Mountains; e). Volcanoes; f). Stalactites; g). flooding; h). loose soil;
Answer:
c).