I believe the answer is A
Answer:
Poverty
Explanation:
Children are dependent on their parents because children could not earn for self. If parents are living under the criteria of poverty then they could not earn bread and butter for their children.
Children get malnourished and even pregnant ladies get malnourished and starve to death. In the U.S around 20% of children are living under poverty. The pregnant women do not get a good environment, proper nutrition due to which the baby gets die prematurely or die after birth. It is a serious issue in-country
I'm not sure but it can be a force that pulls objects with mass towards it.
D. When traffic signals are timed traffic seems to be less dense.
