Answer:
Chronic bronchitis might lead to other diseases because it weakens your immune system and makes it easier to catch diseases and harder to fight them off.
The answer you're looking for is Panda because a panda has an organ system, the other choices are all microscopic organisms so they don't have an organ system
Hope this helped you out :)
For the answer to the question above, I believe that the answer is the <span>Optimists keep up social contact and recreational activities during treatment</span>.
So that the person who he treats will be distracted from his thoughts. I hope my answer helped
Answer:
they ensure valid results
