Why is it important to have gender (f/m) and number (singular/plural) agreement in Spanish?

If you were doing a report on the savannah’s of africa, which of the following websites would be your best resource

Jeff does not have to make a share responsibility payment because he was covered by a health insurance plan through his employer for the full tax year.

What are some of the images and diction used by the narrator that evoke the "dream of america"?