Cancer is caused by accumulated damage to genes. The substance that causes cancer is called carcinogens.
Answer:
an international organization that conducts research worldwide to track the spread of diseases and other health issues
Explanation:
Answer:You know exactly what to get and what you need.
Explanation:
Answer:
A mental health condition that can cause someone to suffer from based on their past. It's caused by shocking events that the person experienced through their life.
Explanation:
The person may go through severe anxiety, depression, intrusive or uncontrollable thoughts, and flashbacks