Why can Harry Potter talk to snakes?

Because in the setting of the novel, Harry has a piece of Voldemort's soul in his head, just on his forehead, where there is a lightning scar. Voldemort is a descendant of Slytherin, and everyone with his surname can talk to snakes.

Harry was not killed by Voldemort's Abada death curse because his mother started an ancient spell at the cost of her life, so Voldemort's spell was useless to Harry, but bounced back to herself. Voldemort left a soul fragment on Harry without his knowledge, so Harry had the ability to talk to snakes.

Extended data:

Character image

Harry has a pair of bright green eyes, black and messy black hair (there are always unruly strands of hair standing on the back of his head), and there is a slender lightning scar on his forehead. This scar has also become a hot topic, which is also one of his characteristics.

When evaluating the freshmen, sorting hat said that it is difficult to decide which college to assign Harry to, saying that Harry is courageous and not bad; I have a gift and a strong desire to prove myself.

He has the characteristics of both colleges. Gryffindor and Slytherin both have the desire to prove themselves. Because of Voldemort's broken soul, he has the talent that Slytherin values. But Harry insisted on not going to Slytherin, so sorting hat sent him to Gryffindor.