<span>True. When oxygen increases, an increase in aerobic organisms also occurs. The increase in atmospheric oxygen favors the appearance of these organisms. The increase in atmospheric oxygen favors the appearance of aerobic organisms. There are several consequences in the evolution of organisms that could use oxygen as the plants that are the main factories of oxygen in the earth and depend on atmospheric CO2 (photosynthesis).</span>
The right answer for the question that is being asked and shown above is that: "Undefined."
AB = XY
BC = YZ
CA = ZY
BC = x + 5
AC = x + 1
YZ = x + 3
XZ = x + 2
x + 5 = x + 3
X = undefined.
They can divide the region by making it harder to move, like mountains and water.
