Answer this ASAP please and thank you.

Sariah enters a room with several chirping crickets in it. upon first entering the room, sariah can hear the chirping; however, as she begins to talk to her friends, she is no longer aware of the chirping even though it is still there. the fact that sariah no longer perceives the chirping sound demonstrates sensory

The american public was excited by the invention of the railroad system. true false

Statement best describes the main reason behind the establishment of government in the early river valley civilization‘s