In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: wind causes erosion, Fact2: Erosion causes destruction of aquatic habitats due to siltation and flooding., Question: Which normal weather event can threaten aquatic habitats? (A) wind (B) oil (C) cold (D) Winter (E) hail (F) snow (G) fire (H) sleet
A