describe a person who has done a lot of work to help people you should say who this person is/was where this person lives/lived what he/she has done to help people and explain how you know about this person

So today I want to talk about my mother, who has done and has always been doing a lot of volunteering and charity work. Whenever I ask her, she just answers that it doesn't hurt to give away. She is truly living as an example of her saying. She is always willing to give a [...]

I would like to talk about a remarkable scientist named Dr. Shafi. He was a renowned professor and scientist who did a lot of things. Dr. Shafi lived in Tehran for many years. He was born and grew up in Tehran, where he trained many students who became famous pharmacists. Dr. Shafi developed new medicine [...]