I think its a because risk actually means exposure to danger our sacrifice your self plz mark as brainly
Answer:
Changes in the environment may leave individuals less well adapted to compete successfully for resources such as food, water and mates. Sometimes an entire species may become unable to compete successfully and reproduce. These problems can lead to extinction.
A is your answer.
Water containing no salt is known as isotonic solution
This is a neutral atom of chlorine.
C. Blood cancerb. Lung can ser is a desease a chain smoker most