Question

please help me.4th question

Answer 1

it is based on ur observance
go on ur neighbourhood and search it ok

Answer 2

$\bold{\boxed{Hoi!}}$

Well this answer of yours needs a data.

This could be done like-

No. of children below 12 who use spectacles= 3

Reasons -
1. Excessive curvature of eye lens.
2. Elongated eye balls.
3. Reading in the dark.
4. Improper diet. etc..

Hope it helps!...

$\textbf{Thanks!}$