In the late 1800s, long-distance communication was difficult. Though there was a postal service, it was slow and unreliable. Letters could take many weeks or even months to travel cross country. Quickly reaching a faraway loved one in an emergency was only possible via the electric telegraph, which was not available to everyone. In contrast, today Americans communicate freely, inexpensively, and frequently over all distances with cell phones and computers. Friends and family, no matter how distant, are only a push of a button away. Which word or phrase makes the transition to a different idea

The word or phrase that makes the transition to a different idea in this excerpt is "in contrast."

Explanation:

In English language, there are certain words or phrases that are used to connect ideas, sentences or paragraphs. These words or phrases are called linking words. There are many types of linking words classified according to their function, for example:

In this excerpt, the phrase in contrast is used as a linking word to show a transition to an opposite idea within the same paragraph and compare communication in two different time periods.

he discover   the sea route around africa hope that ! : )

explanation:

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.