Answer:
B.
optimism
Explanation:
That's the answer on Edge
The answer is D, tuberculosis.
Asthma is caused by inflammation of the airways, allergies are caused by an immunoreaction to a substance, and the flu is a viral infection.
Being underweight can contribute to a very frail and weakened immune system. It can make one feel tired mentally. And can also affect the bones by making them very brittle and frail sometimes.
If he doesn't have friends, he will not be able to have the guidance/help one should need for their life
