Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to be environmentally friendly with ease [title] Turn off your screen saver. [step] Screen savers were originally an application used to avoid a static picture from being branded on the screen. However, nowadays' screens don't suffer of that problem, which makes screen savers unnecessary-and keeping your screen active wastes energy.

Ending1: You can use a browser to switch back on to screen saver mode. [substeps] In any browser, type in your common browser address. Ending2: They can also be harmful to you and your baby. [title] Use a special screen saver for the purposes of keeping your screen physically accessible. Ending3: Instead of the screen saver, apply the option of shutting off screen after five minutes of being unused, so no energy will be wasted on it while it isn't being used. [title] Choose a computer wallpaper with much black in it. Ending4: [substeps] Don't put on screen saver ads when you're watching your favorite movie or reading a good book. It's not really worth it, since screens can become " tuning " too quickly and not get as many views as viewers assume.

Answer format: ending1/ending2/ending3/ending4