It means that when we produce lots of carbon emissions, the Amazon has trees to absorb the emissions and produce oxygen (honestly I think you probably know about this). If the Amazon was destroyed, the earth’s ozone layer would not have lasted much longer
The answer is B because they are opposites of each other.
I think its A
because a flat character doesn't change.
Density can be used in a sentence showing its scientific meaning by defining the term. In definition, you are giving the scientific meaning of the word density and at the same time you are constructing a sentence. For example :
Density is the mass per volume of the material. Basically, it refers to the measurement of how crammed together is the matter. The formula to calculate density is rho = m/v wherein rho is the density, m stands for the mass and v stands for the volume.