Q: What is the reason beak variation came about in birds?\nOptions:\n- (A) By wind and rain\n- (B) Attracting mates\n- (C) It helps them survive\n- (D) the Earth being tilted\n- (E) Competing species evolving\n- (F) it keeps an organism warm\n- (G) To assist in flying\n- (H) Warding off predators
Let's think step by step below.

User
Specialization occurs when competing species evolve different adaptations. Beaks show a lot of variation and specialization for different functions. Beak variation came about because of competing species evolving different adaptations.
Thus, the answer is (E).
Assistant