Respuesta :
1. Navidad because they are recreating the birth of Jesus.
2. Pan de muerto is obviously Día De Los Muertos.
3. Children receiving gifts from the Three kings is Los Reyes Magos
4. People visiting the graves of their loved ones is Día de Los Muertos.
5. Celebrating the win of the Mexican army is El cinco de Mayo
6. Skulls being a popular decor is referring to Día de Los Muertos.
I am Mexican and I celebrate all of these :D Hope this helps!