Answer:
Autoimmune disorder
Explanation:
An autoimmune disorder occurs when the body's immune system attacks and destroys healthy body tissue by mistake.
The blood cells in the body's immune system help protect against harmful substances. These substances contain antigens. The immune system produces antibodies against these antigens that enable it to destroy these harmful substances.
When you have an autoimmune disorder, your immune system does not distinguish between healthy tissue and potentially harmful antigens. As a result, the body sets off a reaction that destroys normal tissues.
Stress Can Be Especially Detrimental to those with Autoimmune Diseases.
A new study has found an association between stress-related conditions such as anxiety and post-traumatic stress disorder (PTSD) and autoimmune diseases such as type 1 diabetes, celiac disease, and rheumatoid arthritis (RA).
The answer to your question is


As you get older many nutritional dilemmas start to pop up, such as loss of appetite, depression, menopause/prostate problems, heart disease, less taste, etc. All of these affect their nutrition and put them at risk for deficiencies.
I hope this helps you!
Swimming or cycling could be considered well balanced
Answer:
A virus, snakes.
Explanation:
There is called this sickness called “Virus” and it’s in China now. It is most likely known to be dangerous. A Virus can kill you, more like eating everything in your body. It may not be poisoning but it can spread.
Snakes are mostly known for poisoning people. They can bite you with their teeth, and their teeth are filled with a poison called “Venom”. It is very dangerous.
I hope this answered your question! It may not be correct but I hope it surely helps you!