What kind of sentences are these (compound, complex, simple, or compound-complex)

1) Eliza remained at home because he had a sore throat

2) My classmates were wearing heavy clothes in the winter months

3) since we had only gotten mail from camp, we could turn back before dark

he believed if we do not fight back the britins would be in every household

delfino 2: diez in the desert analysis: the story, delfino 2: diez in the desert was really about not giving up! that is basically the theme of the story, and also being more prepared. the plot of the story was about diez, the main character, traveling through the harsh desert with other immigrants. also, that keeping the group alive and getting them to their final destination. the setting of the story took place in mexico in the harsh desert.