22. Coracias garrulus is a blue bird with an orange-brown back. The offspring of this bird have an effective defense mechanism. The young birds vomit and cover themselves in a foul-smelling orange liquid when they sense a threat by predators. Which two systems alert the young bird to the danger and help produce the vomit it uses as a defense? a. Nervous and digestive systems b. Integumentary and muscular systems c. Immune and respiratory systems d. Excretory and reproductive systems

## Step 1<br />The problem is asking us to identify the two systems in the Coracias garrulus bird that alert it to danger and help it produce vomit as a defense mechanism. The options provided are:<br />a. Nervous and digestive systems<br />b. Integumentary and muscular systems<br />c. Immune and respiratory systems<br />d. Excret reproductive systems<br /><br />## Step 2<br />The nervous system is responsible for sensing danger and alerting the bird to the threat. This is because the nervous system is responsible for coordinating all the activities of the body, including the perception of danger and the initiation of a response.<br /><br />## Step 3<br />The digestive system is responsible for producing the vomit that the bird uses as a defense mechanism. This is because the digestive system is responsible for breaking down food and eliminating waste, which includes the production of vomit.