Because the have hollow bones, feathers, wings, beaks, and they lay eggs
Answer: (B) Ridge push and slab pull
Explanation: In ridge push, the mantle wells upward because of the convection and elevates the edges of spreading oceanic plates. Because these plates are higher at the spreading center, they are forced downhill due to gravity and eventually flatten out to the ocean floor.
<span>the high expense; electron microscopes are costly</span>
Answer:
use all practicable means to create and maintain conditions under which man and nature can exist in productive harmony
Explanation:
