Final answer:
Pseudomonas aeruginosa is an a) aerobic bacterium that infects the airways of patients with cystic fibrosis.
Step-by-step explanation:
The bacterium Pseudomonas aeruginosa is a) aerobic, meaning it requires oxygen to grow and survive.
This bacterium is commonly found in the airways of patients with cystic fibrosis, a genetic disease that affects the lungs. Pseudomonas aeruginosa is an opportunistic pathogen that can cause serious cases of bacterial pneumonia in patients with CF by infecting the lungs through contaminated equipment or aspiration.