Что это? Кто это?
Ask кто это? when you talk about animate objects (that denotes persons or animals)
Ask что это? when you talk about inanimate objects (that denotes objects)
Notes:
1) Read more about the difference between animate and inanimate objects here - https://www.ruspeach.com/learning/2155/
2) мой, моя - are posessive pronouns, they change their endings because of the gender of the noun they go with. (read more about it here - https://www.ruspeach.com/learning/3371/)
Кто это?
[kto èhta]
- Đây là ai?
Это моя мама.
[èhta maja màma]
- Đây là mẹ của tôi.
Это мой папа.
[èhta moj pàpa]
- Đây là cha của tôi.
Ask что это? when you talk about inanimate objects (that denotes objects)
Что это?
[shto èhta]
- Đây là cái gì?
Это мой стул.
[èhta moj stùl]
- Đây là cái ghế của tôi.
Это моя книга.
[èhta mayà knìga]
- Đây là quyển sách của tôi.
Notes:
1) Read more about the difference between animate and inanimate objects here - https://www.ruspeach.com/learning/2155/
2) мой, моя - are posessive pronouns, they change their endings because of the gender of the noun they go with. (read more about it here - https://www.ruspeach.com/learning/3371/)