It floats on the surface, sustaining life at the bottom of lakes and oceans. <span />
C, cracks where pieces of earth’s crust move past each other due to tectonic force.
When i observe internal parts of plants , i feel that its structure and functions are very complex and dependent from one another
If one part of the plants fail to do its function, it will be most likely that other parts of the plants will be disturbed too
hope this helps
I cannot tell whether this is multiple choice but the most likely explanation is adaptation. Evolution.