The verb rise is used when the subject is doing the action.
The yeast dough will rise after about an hour. The dough rises.
I rise from bed each morning. I rise.
Prices rise when supplies are short. Prices rise.
Use the verb raise when the subject is doing action to an object.
I raise the window shades every morning. Raise the shades.
We can raise the price on these mowers. Raise the price.
Sarah will raise her hand when she knows the answer to the question. Raise her hand.
Use rise to show action that a subject does on its own. Use raise when the subject does the action to an object.
It’s your turn. Decide if you should put rise or raise into this sentence. I need to ____ the flag on the pole. Did you figure it out? Good for you!