Given the question: You are presented with the question "a part of birds where what is dominant to curly helps them fly and provides insulation?" and the following answer choices: - Animal fur - bioaerosols - fur and fat - Vanes - Epidermis - sweating - staying warm - straight Now knowing that feathers help birds fly and provide insulation and straight feathers are dominant to curly feathers , choose the best answer.
The answer is:
straight