English question and two kind of answers

English question and 2 kinds of answers

(?) Is she reading a book
(+) Yes, she is reading a book
(-)  No, she isn't reading a book

(?) Is morning Bell ringing
(+) Yes, morning bell is ringing
(-)   No, morning bell isn't ringing

(?) Is he drinking
(+) Yes, he is drinking
(-)  No, he ia not drinking

(?) Are they playing
(+) Yes, they are playing
(-) no, they are not playing

Father is drinking some water.
1. What is father doing ?  drinking some water
2. Who is drinking some water ? Father

My mother is sitting on the chair.
1. Who is sitting on the chair ? My mother
2. What is my mother doing ? Sitting on the chair

My sister is reading a magazine.
1. What is my sister doing ? Reading a magazine.
2. Who is reading a magazine ? My sister

They are playing basketball.
1. What are they playing ? Basketball
2. What are they doing ? Playing basketball