Answer:
B could be correct not 100% sure what the answer is
Explanation:
Answer:
What is the diagram so I can help?
Explanation:
A because he would motivate them to do work by watching them making sure their not slacking.
When the body is given weakened/dead pathogenic material this helps build up an immune system towards the actual live infection. It prepares the body for the infection so that the person does not get sick.