The best and most correct answer among the choices provided by your question is the second choice which is "railroad tracks."
<span>By 1860 the Midwest and the East were united by a network of railroad tracks.</span>
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It's a lot of problems but the big problem is losing their jobs and houses and don't have enough food and clothes
Answer:
A. Birth rate.
Explanation:
The bir th rate refers to the ratio of the number of live -born bir ths per year. In other words, it is the number of people or animals, or living beings born per year.
To measure the number of children born in a country, the best rate measure will be the bir th rate. This will provide the number(s) of babies born in that particular place in a year.
Thus, the correct answer is option A.
