<span>The systematic study of human society and social institutions is known as: Sociology
Sociology studies how human society developed in term of its development, structure, and functions despite all societal problems that derived because of day-to-day interactions between its individual members.</span>
1. employees 2. bond account 3. rivers
The immune system contains the vital lymphatic system. This system is composed of lymph nodes and lymph vessels. Together they act against bacteria, viruses and other foreign entities that enter our bodies. This acts as our defense system. These systems act as our immunity from the harmful agents outside our body.
That instrument is a Xylophone
