Aperson going to bed because she feels sleepy is an example of a response to an stimulus

A person going to bed because she feels sleepy is an example of voluntary and internal stimulus

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.