Based on the options provided, if the diagram is showing the movement of ions from an area of low concentration to an area of high concentration, it describes active transport. This process requires energy to move ions against their concentration gradient.
If the diagram illustrates the movement of ions from an area of high concentration to an area of low concentration, it describes facilitated diffusion, which does not require energy and occurs along the concentration gradient.
To determine the correct answer, it is essential to analyze the direction of ion movement in the diagram. However, since you are referring to a portion of a cell membrane and the options provided indicate a misunderstanding of active transport principles, the most likely correct answer is:
- Active transport moving ions from an area of low concentration to an area of high concentration.
If the diagram indicates the movement from high to low concentration, then the correct answer would be:
- Facilitated diffusion moving ions from an area of high concentration to an area of low concentration.
Make sure to evaluate the diagram accordingly to choose the precise answer.