They require knowledge about people.
Explanation:
The veins (blue) take oxygen-poor blood back to the heart.
Answer:
eat only three meals per day with no snacks
Explanation:
seems right
The correct answer would be lead paint. Even though there has been a decline in the amount of lead based paint that is used nowadays, still the largest source of lead poisoning in children in America comes from dust and chips from deteriorating lead paint on the inside walls of their homes and schools.