Ernesto was very happy and satisfied with his performance.
Step-by-step explanation:
The lesson talks about the problems that the people face when they move to a new country and they have to face some challenges and problems. When Ernesto came to a new place, he had to face with the problem of learning new language which was English.
But when he had conquered the new words, he was very satisfied with his own performance by learning words like butterfly. It gave him a feeling of happiness.