Gravitational attraction causes the atoms and particles within a nebula to move closer together, reducing its volume. what likely occurred in the nebula as a result of these changes?

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion