Que son los usos horarios

Una zona horaria es una región del mundo que observa una hora estándar uniforme para fines legales, comerciales y sociales. ... Algunos países de latitudes más altas y zonas templadas utilizan el horario de verano durante parte del año, normalmente ajustando el reloj local en una hora.

Explanation:

i am a little confused myself with what goes with the letters and what goes with the numbers but ill do my best to you

the cordillera states and grand canyon are along the southwest u.s. and northern mexican pacific.

the great plains and southwest desert are also the prairie and home to many earthquakes too .

the coastal plains have poor soil and many factories started in the south.

is this what u needed? if not i can see what i can do