Still no option to change screen saver, and why do I suddenly have Animals …

I last posted on this back in July. There is no longer an option to change the screen saver pictures/type anymore. Preview, yes. Type, NO. That option disappeared months ago.  

I had originally (when the option existed) set my screen saver Type to Landscapes.  It has suddenly changed, to Animals.  I do not want Animals. How do I get Landscapes back?