Which of the underlined words, in the text, are adverbs?

Próximas questões
Com base no mesmo assunto
Q670069 Inglês
“And now here (1) is my secret, a very (2) simple secret: It is only with the heart that one can see rightly (3); what is essential (4) is invisible to the eye.” 
Which of the underlined words, in the text, are adverbs?
Alternativas