Ans. Helen Keller learned to communicate through the guidance of her teacher, Anne Sullivan. Sullivan used a method called finger spelling, where she would press the manual alphabet into Helen's palm to convey words and concepts. Through consistent and patient teaching, Keller began to associate these tactile signs with objects and ideas, gradually developing a vocabulary. Eventually, she learned to read Braille and write using a specially designed typewriter. Keller's determination and Sullivan's dedication played a crucial role in her ability to communicate effectively.