Biology

The most accurate answer would be: C.Na+ is diffusing passively, and Amino Acids are transporting actively.

Here’s why:

1.Na+ diffusion: Sodium ions (Na+) typically move across the membrane down their concentration gradient (from high concentration outside the cell to low concentration inside the cell) via passive transport (like simple diffusion or facilitated diffusion). The diagram suggests that the Na+ concentration outside the membrane is higher, so it will tend to move passively into the cell.

2.A...