The fact that Bert's friend Ernie keeps him amused by telling funny stories best illustrates the ____ dimension of friendship

In group prenatal care,

A) expectant mothers are grouped by age, and each group is seen by an assigned health-care provider. B) trained leaders provide expectant mothers with a group discussion session after each medical checkup. C) expectant mothers and fathers take turns facilitating group discussions. D) whole families are included in prenatal visits, including mothers, fathers, and siblings.

The process of ________ ensures that ions will distribute themselves evenly through a solvent

Fill in the blank with the appropriate word.