Darwins proposed theory is the survival of the fittest.
I guess the answer is B !! as it has no relevance and is not an observation !!
<em>Although the landscape shows a certain ability to persist, underground mining activity has caused some effects such as ground fissures (cracking), disturbance of the vegetation community and damage to strata.</em>
The graph is showing us the tide height in feet in the left side and the hight up and down.
A . The diuretic phase lasts for one to three weeks
