Is a sphere a solid object with 2 equal parallel circles as bases ?

Look at this painting by cimabue. this painting demonstrates the use of

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

What is one popular pop artist or group (from today or from the past)? why does this person/group's music fit into the pop genre? why do you think the person/group was successful with their music?