Plz I need help with 3 and 4

3 d is the correct answer but I am not sure about answer 4 I think the answer should be ans4d because Your kidneys remove wastes and extra fluid from your body. Your kidneys also remove acid that is produced by the cells of your body and maintain a healthy balance of water, salts, and minerals—such as sodium, calcium, phosphorus, and potassium—in your blood. That helps it to stay balance

answer; the above statement/question is (false);