One of the aspects of sibling relationships that make them fairly unique is that .

bandage and love

Explanation:

for siblings usually they may fight and talk badly about each other but they still love each other when they're alone they can be all cosy with each other they still love each other up to the end even though you may talk bad about this one and that one but they still love each other so that but is very unique and cannot be broken even though you try to it still stands

answer; elasticity of the lungs decreases;