There are several ways in which human economics and ecology are linked, but perhaps the most prominent way is that humans tear down forests for fuel and other reasons, which disrupts the environment of many organisms.
Answer: Concentrated in certain areas
Explanation:
Volcanoes are usually formed as a result of collisions or other activity between plates at plate boundaries.
As a result, they are more usually concentrated in zones where there is more plate activity such as at the edges of continents, on islands and beneath the seas in certain areas because this is where plates usually collide with each other.
C) A is probably much more closely related to B than to C.
Because A/B have 95% DNA in common, but A/C only have 50% in common.
The control group is the one that controls the whole experiment and the experimental group is the one that receives the variable being tested.