D because all your veins ate nearly in your heart and if your heart stops they stop too
Here are some of the animals that have names that start with S: seal, sheep, skunk, sloth, sparrow, squirrel, swan, salamander, scorpion, serval, snake, spider, stork, etc.
Hope this helps :)
Answer:
C.
Explanation:
Here is a defintion of the immune system:
The major function of the immune system is to protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body.
C. matches that definition nicely.
:)
