The relative highness or lowness of sounds produced by the human voice is called

its a deep and low pitch or uh I forgot the name too it

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

maritime tropical may be your answer.