Which organ systems are used to the body shiver?
a. circulatory and respiratory
b. nervous and muscular
c. circulatory and muscular
d. respiratory and nervous

D respiratory and nervous

B. nervous and muscular

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.