Asthma narrows airways to the lungs and in the lungs by contraction of muscles around the air passages, swelling of the airway lining, and build-up of excessive mucus. because of this, asthma makes both the and systems work harder to deliver oxygen to the cells throughout

Asthma narrows airways to the lungs and in the lungs by contraction of muscles around the air passages, swelling of the airway lining, and build-up of excessive mucus. Because of this, asthma makes both the Lungs and Respiratory systems work harder to deliver oxygen to the cells throughout I hope this helps

it is b

explanation: mark brainliest because i am trying to get to the next level and i just need 1 more

the denominator has a very specific role.