Between 1999 and 2001, ecuador lost almost 10,000 teachers when they moved to other countries. which term best describes this movement?

The term best described this movement is emigration or migration whether legal or not. In these years, a lot of Ecuadorians not only teachers but a lot of skilled workers and educated people have migrate to Europe especially Spain because this is the time when Spain to enter the country as visitors or tourists without visas. This is caused because of financial and economic crisis the country experience that cause rise of unemployed and the fall of its currency, the Sucre.

^^^ i agree with the person above me, good luck on whatever : )