Which element of musical notation does this image represent?

Escoge uno de estos temas, escribe tu tesis y plantea 3 argumentos y 3 contraargumentos. a. control de natalidad de gatos y perros

Order these space notes in the bass clef from highest space to the lowest space

Acurious child asked his mother: “mommy, why are some of your hairs turning grey? ” the mother tried to use this occasion to teach her child: “it is because of you, dear. every bad action of yours will turn one of my hairs grey! ” the child replied innocently: “now i know why grandmother has only grey hairs on her head.”