Poor appetite unintentional weight-loss nausea itching fatigue muscle cramps muscle tone loss recurrent urinary tract infections bad breath fluid retention irritability poor muscle tone metallic taste in mouth skin discoloration are symptoms of

The correct answer is CKD or chronic kidney disease.

Explanation:

A condition in which the glomerular filtration rate of the person falls below 60 ml per minute for more than three months or when the albumin to creatinine ratio of the urine of the person comes over 30 mg per g is known as the chronic kidney disease. The prime reasons for the condition are high blood pressure and diabetes mellitus. The individuals who are primarily vulnerable to CDK are the ones suffering from stroke or heart issues, obese, are more than 60 years old, use tobacco, and are having a family history of the condition.  

In case of kidney failure takes place than the general symptoms are nausea, unintentional weight loss, muscle cramps, itching, loss in muscle tone, fatigue, metallic taste in the mouth, recurrent urinary tract infections, urinary incontinence. discoloration of the skin, bad breath, and others.  

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.