Randolph is walking down the street of his hometown, after being away for several years, when he smells the scent of freshly baked pie coming from a local baker. he suddenly has vivid memories of walking down this street as a child, holding both of his parents’ hands, and swinging between them, feeling relaxed and happy. this is because the sense of smell projects directly to the which is responsible for memories.

The correct answers are the limbic system and emotional.

"…This is because of the sense of smell projects directly to the limbic system which is responsible for emotional memories. "

The reaction Randolph had is because of the sense of smell projects directly to the limbic system which is responsible for emotional memories. That is why he remembers when he was walking down the Street as a child with his parents smelling the scent of freshly baked pie.  

The structures that lie on both sides of the Thalamus are the limbic system. It’s under the brain. Scientists consider that the limbic system is responsible to create emotions. Along with the autonomic nervous system, the limbic system is the creation of emotions when we remember something.  

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place