A hurricane grows in size before it makes landfall, so a cone is a natural choice for a path; the width of the cone grows larger along its length just as the radius of a hurricane grows along its path.
The acidity of the body's fluid is determined by the concentration of hydrogen ions.
Hydrogen ions with the formula H3O+(H2O)n are developed by the addition of protons to one or more water molecules. It is made up of a proton or a particle carrying a unit positive electric charge.
The evolution of organisms are based on the resources available in order for it to be capable of growth still. In the given choices above, the substance or chemical that changed over time is the supply of carbon dioxide which is an essential substance for photosynthesis. Thus, the answer the first choice.
So it won't be very dense