Answer:It should be killing harmful bacteria
Explanation:
A. role models: we do not know who owens role models are so a cannot be the answer
b. heredity: the passage states that there is a history of addiction within owens family so b is the correct answer
c. family: the passage states that his family has decided to avoid addictive substances so c cannot be the answer
d. peers: the passage states that owens peers avoid tobacco to stay fit and healthy to play soccer so d cannot be the answer
the answer is B
The thyroid is a butterfly-shaped organ located in the center of the neck. It produces hormone controlling speed of one's metabolism. When a person's thyroid does not work properly the person most likely to experience the following symptoms: Change in weight, Neck swelling, heart rate changes, mood swings, hair loss, feeling too cold or hot. For hypothyroidism one can experience dry skin, brittle nails, numbness in the hands, constipation, abnormal menstrual periods. For hyperthyroidism includes muscle weakness, vision problems,diarrhea and irregular menstrual period.
The threat of an unsafe environment
