All neurons can produce chemical impulses and have within them an axon hillock that decides if the impulse will be produced or not. Learn how this dynamic processing center uses incoming signals from other neurons to make its decision.
The land form that would be best for farming would depend on what you're farming. The best type of land for farming crops would be flatland - or plains. In the south the area used for farming is the Piedmont area, the area between the hills and the coastal plains. The land form that would be best for farming would depend on what you're farming.
Wet rice agriculture was particularly well suited to Japan because it does not require a lot of land. Good rice land is scarce in Japan, and it is separated by mountains and streams. The typical Japanese farm, even today, is less than an acre in size.