Chemoreceptors are responsible for taste, and are responsible for sensing whether the food is spicy or not. Mechanoreceptors are responsible for taking sensations of mechanical movement and nocioreceptors are pain receptors and would be responsible for giving you an overall reaction (usually of pain if you cant tolerate the spicy food)
The answer would be B. Radio waves have long wavelengths and Gamma Rays have shorter wavelengths. Radio waves have larger wavelengths than Gamma rays. I hope this helps:)
Brain sends signals to the nervous system and identifies pain, pain can come from an injury which will need treatment in order to heal and ease the "pain" that you feel. That's what I understood from it atleast..
It was significant because it showed that those who did not support the centralization of the federation fully still believed in the constitution and used its means and the american way to change the legislature, instead of just yelling and complaining.