It could be bad habits like Smoking and Alcohol. Others can't be controlled, it could be biological (your grandparents had it, your parents, and now you) . Others could have been prevented, like being Obese, or your just not in healthy shape.
I believe the answer is environmental pollution
Answer:
The sun's vertical rays strike the Tropic of Cancer, 23.5° north of the Equator, during the June solstice. ... At the North Pole and South Pole, the solstices mark the time when the sun is highest or lowest in the sky. In this way, solstices are the extreme examples of “midnight sun” and “polar night.”
Explanation:
i hope it's help you"
The nucleus directs cell activity and is the control center.
