Answer:
The Carboniferous era had large deposits of coal matter in the soil. However there was absence of decomposers which gave rise to increased accumulation of organic matter in the soil.
Decomposers make use of oxygen to breathe in the soil due to their existence as animals and not plants. They inhale oxygen and give out Carbon dioxide.
Absence of these decomposers mean increased level of oxygen due to its non usage and reduction in CO2 which is the end product of respiration for the decomposers.
<u>ANSWER:</u>
The height, depth and width within anybody signifies that the object on the particular element is three dimensional.
<u>EXPLANATION:</u>
The correct answer to the current question is three dimension because the earth has all three elements. If any one of the three dimension were missing the earth would be a two dimensional space. We would like flat bread or simple art drawn on paper if any of the given dimension was non existent.
D) Because the west coast lies on a plate boundary, while the east coast does not