Could someone give me a brief definition of the civil war era? (1 or 2 sentences)

getting ready for work:

i sit up in bed, the time is 6: 15.

i go in the bathroom and take a long hot shower and brush my teeth.

i get dressed then grab my keys and open the door, then i realize it is raining so i go back   and get an umbrella.

when i get in my car it has very little gas and right when i get there my car runs out of gas.

when i get inside i am fired for being late.

i hope this i spent an hour on this.

the correct answer is a.

since in the sentence the word beacon is used as "guide".

lighthouse:

high tower located on the coasts and ports that emits a powerful light at intervals to guide navigators at night.

luminous tower.

beacon synonyms as a guide: lighthouse, north, tower