His - \"его\", her - \"её\", its - \"этого - в ср.р.\". Мы выбираем нужное местоимение в зависимости от рода подлежащего в предложении:1) This is a cat. Its name is Betty. - животное - средний род2) Eddy plays with his friends. - мужской род (мальчик)3) These are a girl with her mother. - женский род (девочка)4) Nelly rides a bike. Her bike is black. - женский род (девочка)5) Rob is a pupil. His friend is a pupil too. - мужской род (мальчик)