This is telecommunications medium, which became popular in the mid-1900s, sends audio and video, usually into individual homes.

The correct answer is television.  

Even though we can trace mechanical television back to the 1800s, by 1934 every television had been converted into the electronic system. By 1938 television sets were produced and released commercially.  Since the 1950s television has become a crucial form of communication found in every house.

freedom of speech is also protected by the 1 amendment.

explanation:

here is pretty much what the 1st amendment says:

congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.