the Transcontinental railroad allowed people to travel from San Francisco to cities on the Mississippi River. which best describes the historical theme that this illustrates?

answer; the correct answer to the above statement is world trade center towers were build///110 story north tower of the original world trade center was

this defines the ability for a flex item to grow if necessary. it accepts a unitless value that serves as a proportion. it dictates what amount of the available space inside the flex container the item should take up.

give brainlest