Which factor regulates the opening and closing of stomata in leaves?

preservation because he preserves part of the land and preserves means save

explanation:

the question isn't complete here so i can't right an answer '_'

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

i won't lie i don't know so go online and ask google thats what i do