Which words correctly fill the paragraph? Diffusion can be described as the overall movement of particles from an area of their ......1...... concentration to an area of their ......2...... concentration, with the movement occurring ......3...... a concentration gradient.
- A1 higher, 2 lower, 3 down
- B1 higher, 2 lower, 3 up
- C1 lower, 2 higher, 3 down
- D1 lower, 2 higher, 3 up