a boy wearing jean shorts, and a black and blue shirt, reading a book, sits on a rolling device up against a wall that says book fair, while other people stand around.
A boy is wearing clothes.
A boy wearing jean shorts, and a black and blue shirt, r is definitely wearing clothes.
Jean shorts and a black and blue shirt is the same thing as clothes.
"A boy wearing jean shorts, and a black and blue shirt" implies a boy is wearing clothes.