In simple diffusion, some molecules can move in and out of the plasma membrane without the use of energy along the concentration gradient. These molecules include carbon dioxide, oxygen, water and others. While in facilitated diffusion, carrier/channel proteins are needed to aid the molecules across the concentration gradient.
It has a base that is holden so it wont fall
A virus, because it has a non-cellular structure.
Answer - A. Mating Must occur randomly
Reasoning - Since mating must occur randomly are helps with the balance or equilibrium in genetic without any changes within that population since we do not want genetic drift, mutation and especially do not want any foreign or different species mating with the species we are targeting. So A is your best answer.