The answer is the first group
<span>If an animal learns to use a tool in one way and then is presented with a new situation in which it applies the tool, the animal is demonstrating
a. imprinting.
b. operant conditioning.
c. classical conditioning.
d. insight learning.</span>
Chemokines act as chemoattractants. They lead <span>to the migration of immune cells to an infection site so they can target and destroy invading bodies such as microbes. Hope this helps.</span>
