Which system has the main function of the body’s defense?
a. endocrine
b. skeletal
c. lymphatic
d. integumentary

The system  that  has  the  main  function  of  the  body's  defense  lymphatic   (answer  C)

 explanation

The body  defense system  fight against  bacterial, virus,   and other pathogen  that are  harmful  to  the body.

Lymphatic system  plays  a role of  transporting  lymph. lymph  is a fluid  that  transport  white blood  cells  to and  from lymph  nodes into bone .

The   transported white  blood cells are responsible   in fighting against bacterial, virus and others harmful  pathogen

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )