Answer:
Urinary tract infections.
For some people, especially older adults, the only sign of illness might be microscopic blood in the urine. Kidney infections (pyelonephritis). These can occur when bacteria enter your kidneys from your bloodstream or move from your ureters to your kidney(s)
Substitution I believe is the right answer but I never learned identity property
System that removes solid and liquid wastes is called excretory system.
Hope this helps~
The correct option is C.
Economics as a course is divided into two major sub specialties, which are micro and macro economics. Micro economics has to do with the study of individual, households and businesses behaviors in decision making and uses of scarce resources. Macro economics on the other hand has to do with the study of how the whole economy behaves. Thus, macro economics is the study of how a nation's economy work and this usually involves the national government.
