EASE HELP WILL GIVE BRAINLIEST HELP How has one invention in telecommunication helped lead to the next one?

We used the string telephone to talk to each other from rooms then a new technology was found called electricity we used electricity and waves in the atmosphere to communicate with others (the kind where we had to put our finger into the hole and find the number) then another type was invented and we had easier ways of making calls with only tapping our finger on a button. Then lastly we used smartphones that have touch screen and things to help us. Like playing games and seeing each other when talking. each telecommunication device had improved dramatically and each one made gave the next person more information on how to build a new and better telecommunication device.

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.

small european communities with shared traditions consolidated into large new states (apex)