I would say A, since the north of Mexico is still temperate, its middle is subtropical, more animals can adapt to the climate and habitat
a) This is because the other choices are either way too early or too late. Plus kids enter puberty around middle school.
A. Capitalize Yale University because it is the name of a specific place.
Answer:
Maybe you could write because people are consentrating on their phones juring class.
Maybe they are skipping lessons .
Maybe the teachers are sleeping in class because they did not get their full sallery.