Which of the following inventions of the 1950s made other inventions possible?

You didn't give us choices, but I suspect the answer you're looking for is:

the transistor

John Bardeen, Walter Brattain, and William Shockley were awarded the Nobel Prize in Physics in 1956 for the invention of the transistor. (It might be noted, however, that there was some friction between Schockley and the other two members of the Bell Labs' team, Brattain and Bardeen.) A 2007 article in Computerworld magazine calls the transistor "the single most important invention of the 20th century." In addition to its early uses, making transistor radios and car radios possible, transistors have become the key component to all types of electronic devices. The transistor also functioned as "the building block for the processor," according to Computerworld.

an effect of the steamboat's popularity was that people began building canals in the united states and europe. this was done to find another way to transport goods across the country and in that time, transportation using the river was very slow and dangerous. it depended entirely on manpower and the current of the river. that all changed in the late 1700's when steamboats were introduced. they soon revolutionized travel and trade through the river and dominated the waterways. eventually, other means of transportation took over from the steamboats, but there was a time that they the united states to expand to the west.

establish villages

explanation: