Which picture?, pls Clip the picture for the answer.
Simple Diffusion Across the Cell (Plasma) Membrane. The structure of the lipid bi-layer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.
2. The evolutionary process through which new species emerge
The most applicable answer would be D. Energy
Changing environments and competition for survival are the answer so D is the correct answer
