“Most girls get their first period when they're between 10 and 15 years old. The average age is 12, but every girl's body has its own schedule. Although there's no one right age for a girl to get her period, there are some clues that it will start soon.”
That is from kidshealth.org
<span>The spongy material in the center of hollow bones is bone marrow.
- true
</span>
Answer:
A person needs to have a cigarette to feel happy.
Explanation:
The correct answer is b, phagocytosis and infection
