Answer:
Ozone
Explanation:
Ozone is considered a pollutant in the troposphere, but in the stratosphere it is essential to life on earth because it absorbs biologically harmful UV radiation. The mesosphere and the thermosphere are two additional atmospheric layers above the stratosphere.
The region of the mitochondria with the highest level of hydrogen ion is the INTERMEMBRANE SPACE.
The mitochondria is made up of many parts, such as the outer membrane, the inner membrane, the intermembrane space, the cristae and the matrix. The high concentration of hydrogen ion in the intermembrane space is used to power ATP synthase.
C. It requires active transport because the use of energy is necessary, the natural and opposite flow to this, would be from high to low concentration that requires little to no energy (i.e passive diffusion).