TASK DEFINITION: You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
PROBLEM: Which adaptation helps a bird fly?  
 (A) larger feet (B) bigger eyes (C) longer beaks (D) hollow bones

SOLUTION: D

PROBLEM: What season is the Northern Hemisphere experiencing when it is tilted away from the Sun?  
 (A) spring (B) summer (C) autumn (D) winter

SOLUTION: D

PROBLEM: Which two are functions of flowers?  
 (A) attract pollinators and make seeds (B) make seeds and store food (C) store food and take in water (D) take in water and attract pollinators

SOLUTION:
A