There are protien shakes that help you gain permanet weight if you are having trouble with this.
Steroids
Because I am a 13 year old boy and I am From Philippines, and my height is 5'0 but I am too thin and I weigh about only 30 kilos.
The height of a 2.5 year old boy will vary depending on genetics. The average of a 2.5 year old boy is around three feet.
no
Ten feet
45
it is about 5'2
There is no perfect height. It is different for each person.
The average or normal height of a ten year old girl who's in 5th grade is 4'5-4'8
It is possible, but not very likely. Most males stop growing by the time they finish puberty. And 23 is a man, not a boy.
Your training and calorie intake probably suck. Go read Starting Strength by Mark Rippetoe.
It depends. There is no fixed height for anyone.