D would be the answer tomthis
It relates to the meaning of the pores of skin because it lets in and out only certain things.
I hope this helps, Sweetie.
A) Crest
B) Amplitude
C) Trough
D) Wavelength
Air because of the density
Osmosis would happen when the semipermeable membrane separating two parts would be permeable to desired the solute. It is a process of passing through solute molecules through a membrane with concentration gradient as the main driving force.
