Solution:
Answer: (C) Forelimbs have strong
Explanation:
Birds have evolved a number of adaptations that enable them to fly. These adaptations include:
- Hollow Bones: Birds have lightweight, hollow bones that reduce their overall body weight, making it easier for them to take off, fly, and stay airborne.
- Feathers: Feathers provide the necessary lift and thrust for flight. The structure of the feathers is designed to maximize aerodynamic efficiency.
- Wing Shape: The shape of a bird's wings is crucial for flight. Wings are typically curved on the top and flatter on the bottom, creating an airfoil shape that provides lift.
- Powerful Flight Muscles: Birds have powerful pectoral muscles that provide the force needed to flap their wings.
- Streamlined Body: A streamlined body shape reduces air resistance during flight.
- Large Sternum (Keel): The large sternum provides an attachment point for the powerful flight muscles.
- Efficient Respiratory System: Birds have a highly efficient respiratory system that provides the necessary oxygen to sustain flight.
