Answer:
Throughout the overview segment elsewhere here, the benefits including its particular circumstance are listed.
Explanation:
- Being willing to hunt with either a community relatively successfully, thereby increasing their likelihood of succeeding as well as physical inactivity.
- Selective pressures such as illness as well as predators will assist to evolve altruism because grooming allows the person to have been groomed first, but also protects diseases from being transmitted through lack of hygiene.
- Grooming encourages people to bond, which enables less friction and increases development by increasing security.  
 
        
             
        
        
        
Answer:
Organs of excretion make up the excretory system. 
They include the :
kidneys-Blood by-products are filtered out by the kidneys and leave the body in urine form. They are part of the urinary system, which also includes the ureters, bladder, and urethra
 large intestine-By-products enter the intestine and leave the body in the form of feces
 liver- breaks down harmful substances. It's by-products are excreted into bile or blood.
 skin-Sweating eliminates excess water and salts, as well as a small amount of urea, a byproduct of protein catabolism
lungs- oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the bloodstream and then exhaled
Hope this helps!!!!!!
Forever friend and helper,
Cammie :)
 
        
             
        
        
        
Population density  =number  of   individual  divided  land  area
land  area  should  be  in  square kilometers
therefore 120  ha  =120  x0.01=1.2 square kilometer  since   1 ha=0.01  kilometer  square
total  population=  (80  x  1500)/100=1200
population  density   is therefore=1200/1.2=1000