Answer:
What?
Explanation:
I don't understand the question.
Which structure are you talking about??
Answer: The answer is the Stratosphere.
Answer:
D
Explanation:
Fire is man made because for there to be fire you have to strike a match or use other man made sources
Answer:
The acquired immune system, with help from the innate system, produces cells (antibodies) to protect your body from a specific invader. These antibodies are developed by cells called B lymphocytes after the body has been exposed to the invader. The antibodies stay in your child's body.