Question

imagine that the lungs and size of elephant. is there any relationship between body size and lungs size

Answer 1

There is no specific relation.
But lungs of bigger creatures have stronger muscular walls for regulation with ease.

Answer 2

yes of course.

elephants are huge and they have all body parts huge so indirectly. the lungs will be bigger compared to others.(size of organism decides the size of its organs)

so the lungs or any other part is bigger than humans as it is larger than a human

we know that to work a huge body, we cannot use smaller components to work the huge body so all parts must be in proportion so as yo proper function of the body