{ 1 } - stimulate other people to action.
{ 2 } - influence the emotions of other people.
{ 3 } - express our feelings.
{ 4 } - all of the above.

Ima said to her baby sister, "It's good to pick up our toys."

Here Ima, besides expressing her feelings, is trying to get her baby sister to have positive feelings about picking up her toys -- and to act accordingly.