The upper arm bone is the claveical
Answer:
For survival
Explanation:
All organisms need to adapt to their habitat to be able to survive. This means adapting to be able to survive the climatic conditions of the ecosystem, predators, and other species that compete for the same food and space.
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They swam faster and learned to hide
<span>Biomes are defined as the world's major communities, classified according to the predominant vegetation and characterized by adaptations of organisms to that particular environment.</span>
They have to have a higher density than water to have the ability to stay on the sea floor. Otherwise they would just float to the surface of the water
