I think it’s B I’m not sure
The solute can move "downhill," from districts of higher to lower fixation, depending on the specificity of the protein bearer to go through the film. This procedure is called uninvolved transport or encouraged dissemination, and does not require vitality.
C is the answer
:) for your question (im writing extra cause answer is too small)
Answer: birds
Explanation: because birds have wings and they can fly
