The wealth of East African city-states was based on Trade.
Answer: Todos los organismos necesitan alimento para la energía requerida para vivir y crecer. Todos excretan (eliminan) los productos de desecho, detectan cambios en su entorno y responden a ellos. Todos los organismos vivos siguen un ciclo vital de crecimiento y desarrollo, reproducción y muerte.
Answer:
Great Britain, France (except during the German occupation, 1940-44), The Soviet Union (after its entry in June 1941), The Unites States (after its entry on December 8th, 1941), and China.
Answer:
Extinction.
Explanation:
Extinction is a process of weakening the appropriate behavior of the person as he/she behaved previously.
Kathy's teacher didn't teach her not to behave like this and ultimately she increased her way of behaving towards the classmates which are called Extinction.
For example, if we are teaching our dog to shake hands with the people but after some time if we are not admiring him or else we are stopping to ask for the shake hand, we are weakening his way of conditioned behavior.
So finally Extinction stops us to make improvements in our unusual behavior.