The correct answer is D.
Girls in general tend to spend more time with friends. This isn't to say that boys don't spend a lot of time with their friends but girls tend to engage more in their social relationships, whereas boys spend more time in competitive sports, more time in clubs and less time engaging in social relationships.
Answer:
The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.
C, as A,B, and D aren't true.
The ecosystem makes the forest sustainable
D. population and nutrients
