Most likely hamburger, as hamburgers are not traditional Spanish foods. Also, tortillas originated from Mexico and pinatas from Spain (most likely), and sauce is such a generic type of thick liquid that every country has, so that it could have no way originated just from the Spanish language.
The ability of a system or living organism to adjust its internal environment to maintain a state of dynamic constancy; such as the ability of warm-blooded animals to maintain a stable temperature is homeostasis.
