La madre canta <u>una</u><u> </u><u>canc</u><u>ión</u> a sus hijos. La madre les canta una canción.
Yo mando <u>una</u><u> </u><u>cart</u><u>a</u> a mi abuelo. Yo le mando una carta.
Tú invitas <u>a</u><u> </u><u>tu</u><u> </u><u>primo</u> a la fiesta. Tú loinvitas a la fiesta.
The underlined words are the ones you have to circle as in the example, and the words in bold are the ones you have to complete as in the example too. (I don't speak english, sorry if I said something wrong ;-;).
they are telling you what to do not a question, i did translate it for you though
Explanation:
Today's Challenge copy title and comparative table Comparative Table on the classification of sectors and their environmental impact by their technical processes, as well as their possible solutions.