It shows the doer of the action.It comes before verb and indicates this action or work is done by it/him/her etc.Ex.Susan switched off the lights. Who switched off the lights? The answer is Susan (subject of the sentence)
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Making sacrifices for a loved one can make a person happy
The purpose of Roosevelt's speech is mostly to <span>boost morale among Americans and reassure them that the military will take action against Japan. the answer is letter A</span>